interactive science 1a

Question Bank

1.1 ISBN 962-99-928-68 ©Pearson Education Asia Limited 2004

INTERACTIVE SCIENCE 1A Question Bank

Chapter 1 INTRODUCING SCIENCE Concept checking Put ‘T’ for a true statement or ‘F’ for a false statement in each box below.

1. Science involves finding out how and why things happen.

2. Although Science improves our quality of life, it has limitations.

3. With our present scientific equipment and knowledge, we can stop thunderstorms from

coming.

4. Touching the hair of a cat is a means of observing the animal.

5. We need not study Science if we do not want to be a scientist.

6. Science affects many aspects of our daily life.

7. Albert Einstein (愛因斯坦) proposed the Law of Gravitation.

8. In a laboratory, students should tie up long hair or school ties.

9. Before using a chemical, we should read the hazard warning labels on its bottle.

10. The hazard warning labels on the bottles of chemicals tell us the uses of the chemicals.

11. When we get a heat burn in a laboratory, we can cool the burnt area under running

water.

12. An eye wash bottle contains distilled water.

13. If your clothes are on fire in a laboratory, the best way to put out the fire is to use a fire

extinguisher.

14. A dropper is used to transfer small pieces of solids.

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15. When we use a dropper to transfer a solution to a test tube, the dropper should touch the

wall of the test tube to make sure that all the solution is transferred.

16. We can use a beaker to make accurate measurement of the volume of a liquid.

17. To mix solutions, we can use our index finger to tap on the bottom of the test tube.

18. The flame of the Bunsen burner is yellow when the air hole is closed.

19. The flame of the Bunsen burner gives a quiet noise when the air hole is open.

20. Before lighting a Bunsen burner, the air hole should be closed.

21. A heat-proof mat should be placed on the tripod when we use a Bunsen burner for

heating.

22. We can use a displacement can and a measuring cylinder to measure the volume of

objects with irregular shapes.

23. A hand-held balance is commonly used in a laboratory to measure weight.

24. We can measure our pulse rates with a stopwatch.

25. The most convenient way to measure the weight of a mobile phone is to use a

measuring cylinder.

26. 1000 mL is equal to 1 L.

27. We can use a measuring cylinder to measure the volume of a liquid accurately.

28. An infrared thermometer is one of the fast operating thermometers.

29. In the end of a scientific investigation, we analyse the results obtained and make a

hypothesis.

30. The first step of a scientific investigation is to do an experiment.

31. In a scientific investigation, we make a hypothesis before designing any experiment.

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32. The results of an experiment should always be presented in the form of written words.

Multiple Choice Put the best answer in each box below. 1. Which of the following subjects is NOT a branch of Science?

A. Biology

B. History

C. Chemistry

D. Geology

2. Which of the following is NOT a scientist?

A. Yang Chen Ning (楊振寧)

B. Lee Yuan Tseh (李遠哲)

C. Sun Yat Sen (孫中山)

D. Tsui Chyu (崔琦)

3. Which of the following is NOT an invention by scientists?

A. DNA

B. Cars

C. Telephones

D. Clocks

4. Which of the following should a responsible scientist do?

(I) Keep the knowledge of Science to oneself.

(II) Use the knowledge of Science to contribute to society.

(III) Help others to understand how the knowledge of Science can be applied to our daily life.

A. (I) and (II) only

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B. (II) and (III) only

C. (I) and (III) only

D. (I), (II) and (III)

5. Which of the following scientists discovered DNA?

A. Thomas Edison

B. Charles Kao

C. Alexander Bell

D. James Watson

6. Henry Ford is famous of inventing __________.

A. cars

B. computers

C. optical fibres

D. light bulbs.

7. Which of the following rules must we obey in a laboratory?

A. Wash our hands after doing an experiment and before leaving the laboratory.

B. Eat and drink in the laboratory.

C. Throw solids into the sink.

D. Do any experiments without the teacher’s permission.

8. Which of the following can be found in a Science laboratory?

(I) Gas tap

(II) First-aid box

(III) Fire extinguisher




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9. Which of the following can be used to put out fires?

(I) Fire extinguisher

(II) Fire blanket

(III) Fume cupboard





10. What potential danger does this hazard warning label warn us of?

A. Harmful

B. Corrosive

C. Radioactive

D. Explosive

11. Which of the following is a proper method of handling spills of chemicals on the skin?

A. Put a Band-aid on the affected area.

B. Wash the affected area under running water.

C. Pour some unknown chemical over the affected area.

D. Use tissue paper to absorb the chemicals and leave it on the bench.

12. Which of the following apparatus is used to transfer a small amount of powder?

A. Spatula

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B. Dropper

C. Test tube holder

D. A pair of tongs

13. What is the use of this apparatus?

A. To hold a test tube when heating

B. To store a solution

C. To support a flask or a beaker when heating

D. To heat things

14. Which of the following statements about transferring a solution from a bottle to a test tube with a dropper is correct?

A. The dropper should touch the neck of the bottle.

B. The dropper should touch the wall of the test tube.

C. The dropper containing the solution should be inverted.

D. Squeeze the bulb of the dropper when its tip is in the solution.

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15. Which of the following apparatus should be used to measure the volume of a solution accurately?

A. B.

C. D.

16. The sectional diagrams of apparatus are usually drawn in ___________.

A. blue ball pen

B. red ball pen

C. pencil

D. colouring pencil

17. Which of the following apparatus is/are usually used to mix solutions?

(I) Spatula

(II) Stopper

(III) Glass rod

A. (I) only

B. (I) and (II) only

C. (III) only

D. (II) and (III) only

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18. Temperature is measured in ______________________.

A. degree Selcius

B. degree Celsius

C. Selcius

D. Celsius

19. Which of the following is the normal temperature of a human body?

A. 35 oC

B. 35 oF

C. 37 oC

D. 37 oF

20. Which of the following kinds of rulers should be used to measure the circumference of our head?

A. Plastic ruler

B. Half-metre rule

C. Metre rule

D. Tape measure

21. If we equally divide a 1-cm interval into 10 smaller intervals, what will the length of each smaller interval be?

A. 1 km

B. 2 km

C. 1 mm

D. 2 mm

22. The volume of water in a measuring cylinder is 15 cm3. When a stone is placed into the measuring cylinder, the volume increases to 34 cm3. What is the volume of the stone?

A. 15 cm3

B. 19 cm3

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C. 34 cm3

D. 49 cm3

23. Weight is measured in ___________.

A. centimetre

B. kilogram

C. degree Celsius

D. millilitre

24. 1 m3 is equal to _________________.

A. 1,000,000 cm3

B. 100,000 cm3

C. 1,000 cm3

D. 10 cm3

25. Which of the following is NOT a unit for measuring volume?

A. Litre

B. Kilogram

C. Cubic centimetre

D. Millilitre

26. Which of the following apparatus is commonly used to measure time in a laboratory?

A. Water clock

B. Sundial

C. Stopwatch

D. Hourglass

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27. ‘1650 g’ can be written as __________.

A. 165.0 kg

B. 16.50 kg

C. 1.650 kg

D. 0.1650 kg

28. A balance is used to measure _________.

A. weight

B. time

C. length

D. temperature

29. Which of the following is the most suitable for measuring 40 cm3 of water?

A. 50 cm3 measuring cylinder

B. 100 cm3 measuring cylinder

C. 250 cm3 measuring cylinder

D. 500 cm3 measuring cylinder

30. Which of the following methods can be used to record the results of an experiment?

(I) Words

(II) Diagrams

(III) Videos


B. (I) and (III) only

C. (II) and (III) only


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31. Albert poured 10 cm3 of water into a test tube, followed by 10 cm3 of oil. He tried to mix the liquids with his index finger. Then he put the test tube aside for 3 minutes. Which of the following statements is NOT an observation after the mixing process?

A. Oil is above the water.

B. Water is below the oil.

C. Oil and water cannot be mixed together.

D. Oil is lighter than water.

32. A hypothesis is ______________________.

A. a problem to be investigated

B. a result of an experiment

C. a reasoned answer based on observations and scientific knowledge

D. an analysis of the result of an experiment

33. Johnny finds the lemon tea too sour. He wants to know whether adding sugar to the lemon tea will make it less sour. Which of the following is a scientific way to find out the answer?

A. Ask his teacher for the answer.

B. Ask his father for the answer.

C. Add some water to the lemon tea and taste it.

D. Add some sugar to the lemon tea and taste it.

34. What should we do when we carry out an experiment?

(I) Pay attention to the procedure.

(II) Use the right apparatus.

(III) Observe the process carefully.


B. (I) and (III) only

C. (II) and (III) only


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35. Which of the following statements about recording the results of an experiment is correct?

(I) We can record the results in many different ways, for example, words and photos.

(II) We can change the results in order to prove that our hypothesis is correct.

(III) We can choose not to record any results if the results are not what we want to get.

A. (I) only

B. (I) and (II) only



Fill in the blanks Fill in the blanks with the words given in the box below (Questions 1 to 3).

1. _____________ is the study of things happening around us and how they affect us and

our environment.

2. _____________ is a branch of Science which studies matter, energy and forces.

3. People who work in Science are called _____________. When they carry out

____________ _____________, they make observations, suggest possible answers to

the questions, and do _____________ to test their suggestions.

Fill in the blanks with the words given in the box below (Questions 4 to 6).

4. _____________ is the first step of scientific investigation. We can do it by seeing,

experiments scientists Physics

scientific investigations Science

smelling equipment inventions

observation feeling apparatus discoveries

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hearing, _____________, _____________, and tasting.

5. To make better observations, we sometimes need certain _____________ and

_____________ besides our senses.

6. Great scientists contribute to society by making many important _____________ and

_____________. For example, The Wright Brothers made the first aeroplane and James

Watson found DNA in human cells.


7. The _____________ is a place for doing experiments. Benches and stools are usually

found there.

8. We should wear _____________ _____________ while heating.

9. In the laboratory, we should tie up _________ __________ and __________ _________.

Otherwise, they may get in touch with chemicals or knock over the apparatus.

10. _____________ _____________ _____________ warn us of the potential dangers of

chemicals.

11. When chemicals get into our eyes in a laboratory, we should stay ___________, report

to the _____________ and wash the affected eye with distilled water from an

_____________ _____________ _____________.

12. We should leave the laboratory via the _____________ ____________ _____________

in case of a fire.

safety spectacles school ties hazard warning labels

long hair eye wash bottle laboratory

teacher fire escape route calm

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13. To put out fires, we can use _____________, a _____________ _____________ or a

_____________ _____________.

14. A _____________ is used to transfer a small amount of liquid.

15. To show apparatus, we often use simple _____________ diagrams drawn in pencil.

16. To heat a test tube of a solution, we should use a __________ __________

___________ to hold the test tube and put it over the ___________ _____________.

17. To heat a beaker of a solution, we should place it on a _____________ and a

_____________ _____________, which are over the Bunsen burner.

18. To mix solutions in a test tube, we can use our _____________ _____________ to tap

on the bottom of the test tube.

19. We should leave the test tube in a _____________ _____________ _____________

when we do not use a test tube.


20. Before lighting a Bunsen burner, we should connect the rubber tubing to the

_____________ _____________, put the Bunsen burner on a _____________

tripod test tube rack fire blanket

index finger dropper sectional

Bunsen burner wire gauze sand

fire extinguisher test tube holder

heat-proof mat blue yellow

irregular regular gas tap close

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_____________, and turn the collar to _____________ the air hole.

21. If the air hole of a Bunsen burner is open, the flame is _____________ in colour and

_____________ in shape. If the air hole is closed, the flame is _____________ in

colour and _____________ in shape.


22. A _____________ is used to measure temperature.

23. The symbol for degree Celsius is _______ and that for degree Fahrenheit is ________.

24. To calculate the volume of a rectangular block, we have to know the _____________,

_____________ and _____________ of the block.


25. We can pour the liquid into a _____________ _____________ to measure the volume

of a liquid. The liquid surface is called the _____________ as it has a shape of a curve.

26. Long distances are often measured in _____________ (km) and short distances in

_____________ (cm) or _____________ (mm).

27. 1 m3 = ________ L

length oF width

thermometer height oC

millimetres meniscus centimetres

measuring cylinder kilometres

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28. In a scientific investigation, we should first identify the _____________ to be

investigated, then make a _____________, design and carry out an _____________.

Based on the results obtained, we can draw a _____________.

29. A _____________ is a _____________ answer based on our _____________ and

scientific knowledge.


30. To test whether a hypothesis is correct or not, we can design a suitable _____________.

The right _____________ can help us get accurate measurements. The ___________ of

an experiment can help us carry out the experiment in an orderly way.

31. When we carry out an experiment, we should pay attention to _______________

_________________ to avoid accidents and _____________ the results accurately.

32. In a _____________ _____________, we can only _____________ the variable under

investigation. All other variables must be kept _____________. We should also know

what result is to be _____________.

observations conclusion problem

experiment hypothesis reasoned

procedure constant experiment

compared record apparatus

fair test safety precautions change

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Short Questions 1. Name THREE branches in Science.

______________________________________________________________________ 2. Name a great scientist and one of his/her inventions.

______________________________________________________________________ 3. Name a great scientist and one of his/her discoveries.

______________________________________________________________________ 4. Explain how these people make use of the knowledge of Science in their workplaces.

(a) Firemen

__________________________________________________________________

__________________________________________________________________

(b) Farmers

__________________________________________________________________

__________________________________________________________________ (c) Bus drivers

__________________________________________________________________

__________________________________________________________________

5. How has Science changed the following aspects of our daily life?

(a) Transport

__________________________________________________________________

__________________________________________________________________

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(b) Communication

__________________________________________________________________

__________________________________________________________________

(c) Health

__________________________________________________________________

__________________________________________________________________ 6. Give THREE examples of how Science has improved our quality of life.

______________________________________________________________________

______________________________________________________________________

______________________________________________________________________

7. Give THREE examples of how Science may bring harms.

______________________________________________________________________

______________________________________________________________________

______________________________________________________________________ 8. State FOUR differences between a Science laboratory and a normal classroom.

______________________________________________________________________

______________________________________________________________________

______________________________________________________________________

______________________________________________________________________ 9. Give THREE possible dangers of not tying up long hair and school ties in a laboratory.

______________________________________________________________________

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______________________________________________________________________

______________________________________________________________________ 10. Give ONE usage for each of the apparatus. (a) Glass rod

__________________________________________________________________ (b) Thermometer

__________________________________________________________________

(c) Spatula

__________________________________________________________________ 11. Give FOUR ways of mixing solutions in a test tube.

______________________________________________________________________

______________________________________________________________________

______________________________________________________________________

______________________________________________________________________ 12. Give TWO reasons to explain why it is safer to use the yellow flame than the blue one.

______________________________________________________________________

______________________________________________________________________ 13. Describe how we do the following:

(a) increase the size of the Bunsen flame

__________________________________________________________________

(b) change the Bunsen flame from yellow to blue

__________________________________________________________________

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(c) prevent striking back

__________________________________________________________________ 14. A group of three students took the reading from the same measuring cylinder. The first

one said the volume is 8.0 cm3, the second one said it is 8.1 cm3 and the third one said it is 8.3 cm3.

(a) Why did they get different readings?

__________________________________________________________________

(b) What would you advise them to do in order to get the same reading?

__________________________________________________________________ 15. How can we measure the thickness of one page of a book with a plastic ruler?

______________________________________________________________________

______________________________________________________________________ 16. (a) Use a ruler to measure the length and width of the rectangle shown below

accurately.

Length = cm = mm

Width = cm = mm

(b) If this is a rectangular block with a height of 80 mm, what is the volume of this

block in mm3 and cm3?

Volume =

Volume =

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17. What are the FIVE steps of doing a scientific investigation?

______________________________________________________________________

______________________________________________________________________

______________________________________________________________________ 18. What are the ‘3Cs’ that we should consider in a fair test?

______________________________________________________________________

______________________________________________________________________ 19. Tommy wanted to do a fair test to find whether salt dissolves in water faster than sugar.

(a) What is the variable to be changed in this test?

__________________________________________________________________

(b) What are the FOUR variables to be kept constant?

__________________________________________________________________

__________________________________________________________________

(c) What is the result to be compared?

__________________________________________________________________ 20. Annie had two hair dryers at home. She observed that hair dryer A seems to be more

effective in drying her long hair than hair dryer B.

(a) If she wants to investigate the effectiveness of these hair dryers in a scientific way, what hypothesis could she make?

__________________________________________________________________

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(b) Suggest an experiment to investigate the effectiveness of both hair dryers.

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________ (c) Hair dryer A takes 3 minutes to dry Annie’s hair up while hair dryer B takes 4.5

minutes. What conclusion could Annie make?

__________________________________________________________________ Long Questions 1. Read the following passage and answer the questions.

History of AIDS

In 1981, Dr Michael Gottlieb reported to the Centre for Disease Control (CDC) in U.S.A. that there were several unusual cases of pneumonia (肺炎) and skin cancer (皮膚癌). Most of the patients were homosexual (同性戀的) men. Strangely, they also had other long-term diseases which usually do not occur in healthy people. Moreover, they had a very low level of a type of white blood cells (白血球) in their blood. These cases of disease were officially named AIDS (Acquired Immunodeficiency Syndrome) in 1982.

There were many predictions for the cause of AIDS. The most popular one was that AIDS was caused by a virus (病毒). Another one was that mainly homosexual men got AIDS because they took many drugs which weakened their immune system (免疫系統).

In 1984, Dr Robert Gallo in U.S.A. and Professor Jean Luc Montagnier in France isolated the virus which causes AIDS. This virus was later named Human Immunodeficiency Virus (HIV) in 1986. The discovery of the virus allowed scientists to develop treatments for patients, vaccines to prevent AIDS, and tests to test people who may have got AIDS.

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(a) Dr Michael Gottlieb is a careful observer. What is his important observation?

__________________________________________________________________

(b) What are the TWO hypotheses about the cause of AIDS?

__________________________________________________________________

__________________________________________________________________ (c) It was found that AIDS is caused by a virus called HIV. Why is it important to

discover this virus?

__________________________________________________________________ (d) Many scientists were involved in the discovery of AIDS and HIV. Give TWO

names of the scientists and their importance in the discovery.

__________________________________________________________________

__________________________________________________________________

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2. Read the following passage and answer the questions.

(a) What invention did Nissan make? What is the purpose of this design?

__________________________________________________________________

__________________________________________________________________

(b) How does the safety system prevent car accidents?

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

(c) What is the limitation of the safety system?

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

Nissan develops a safety system

To decrease the number of car accidents, Nissan, a Japan-based company, is manufacturing a safety system for cars. The system is installed in cars, and uses a laser detector and a camera to check the directions of other cars within 100 m. If there is a danger of a car accident, the system will slow down the car to make sure that the cars are far apart from each other. Drivers only need to control the steering wheels and the safety system will control the speed of the cars automatically.

The safety system detects the reflected light from the tails of the cars in the front. It will slow down the car whenever there is a danger of a car accident. However, it cannot prevent car accidents that involve pedestrians, cars from the sides or cars that bump into another car with their heads.

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(d) Do you think that the safety system is useful in Hong Kong? Why?

__________________________________________________________________

__________________________________________________________________

(e) Cars are an important invention. Give TWO advantages and TWO disadvantages they bring.

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

3. The following photos show some common apparatus used in a laboratory.

A B C

D E F (a) Name the apparatus shown above.

A: _________________________ D: _________________________

B: _________________________ E: _________________________

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C: _________________________ F: _________________________

(b) What is the use of the following apparatus?

(i) A: _________________________________________

(ii) B: _________________________________________

(iii) C: _________________________________________

(iv) D: _________________________________________

(c) Before lighting on B, should we open or close its air hole? Why?

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

4. The following diagram shows a set-up used to boil water.

(a) Name apparatus A to D.

A: _________________________ C: _________________________

B: _________________________ D: _________________________

(b) Which flame should be used to boil water? Why?

__________________________________________________________________

A

B

C

D

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__________________________________________________________________

(c) Which instrument can be used to measure the time it takes for water to boil? Give TWO units commonly used in time measurement and their symbols.

__________________________________________________________________ 5. A teacher asked Mary to dissolve 50 g of white powder in 500 cm3 of tap water. A bottle

of white powder, a plastic container and an electronic balance are available.

(a) Does Mary need other apparatus? What are they?

__________________________________________________________________

(b) How does Mary carry out the task? Describe the procedure and the apparatus used in details.

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________ (c) Later, the teacher asked Mary to boil the solution with a Bunsen burner. Give

FOUR things Mary should do before lighting the Bunsen burner in order to use the Bunsen burner safely.

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

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6. (a) Joseph has an unopened bottle of detergent (清潔劑), an empty bottle of detergent and a bottle cap. Without opening the unopened bottle, how can he measure the weight of the detergent with an electronic balance?

__________________________________________________________________

__________________________________________________________________ (b) Joseph’s teacher asked him to dilute the detergent with water in a ratio of 1:99, and

the final volume of the solution is 500 cm3.

(i) What is the volume of the detergent needed to dilute the detergent?

______________________________________________________________ (ii) What is the volume of water needed to dilute the detergent?

______________________________________________________________ (iii) Joseph’s teacher gave him a 500 cm3 measuring cylinder, a 10 cm3 measuring

cylinder, a 500 cm3 beaker and a glass rod. Describe how to dilute the detergent. Clearly state the apparatus used in each step.

______________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________ 7. Johnny, Betty and Carmen tried to find out whether sugar dissolves faster in hot water

than in cold water. Each of them carried out an investigation.

Johnny’s test:

Variables Beaker A Beaker B

Temperature of water 15 oC 90 oC

Volume of water 50 cm3 80 cm3

Weight of sugar added 5 g 5 g

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Betty’s test:

Variables Beaker C Beaker D




Carmen’s test:

Variables Beaker E Beaker F




(a) Is Johnny’s test fair or unfair? Why?

__________________________________________________________________

(b) Is Betty’s test fair or unfair? Why?

__________________________________________________________________

(c) Is Carmen’s test fair or unfair? Why?

__________________________________________________________________

(d) To do a fair test in this investigation,

(i) what variable should be changed?

______________________________________________________________ (ii) what variables should be kept constant? Give TWO of them.

______________________________________________________________

______________________________________________________________ (iii) what result should be compared?

______________________________________________________________

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8. Albert tried to find out if the blue flame of a Bunsen burner is hotter than the yellow

flame.

(a) He identified the following variables and decided to set up his experiment in four different ways.

Variables Set-up A Set-up B Set-up C Set-up D

Condition of air hole Open Open Closed Closed

Volume of water to be heated (cm3) 100 100 100 250

Size of beaker (cm3) 200 500 200 500

(i) Can Albert use set-ups A and B to test his hypothesis? Why?

______________________________________________________________ (ii) Can Albert use set-ups A and C to test his hypothesis? Why?

______________________________________________________________ (iii) Can Albert use set-ups A and D to test his hypothesis? Why?

______________________________________________________________

(b) Albert was given one Bunsen burner, one heat-proof mat, one beaker, one wire gauze and one tripod. Draw a labelled diagram to show his set-up.

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(c) Name the instrument which can be used to measure the time required to boil the water in a laboratory.

__________________________________________________________________ 9. The diagram below shows a boy playing with a toy car. There is a spring inside it. When

the boy pulls the car back, the spring inside will be pressed. When he releases the car, the spring will drive the wheels and make the car move forward.

Paul thought, ‘The more I pull the car back, the further it goes when I release it.’ He wanted to test his idea.

(a) Write a hypothesis for the experiment to test the relationship between the distance pulled back and the distance the toy car moves forward.

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

(b) The following table summarises the results of the experiment.

Distance pulled back (cm) Distance moved forward (m)

5 2

10 4

15 6

20 Data missing

25 10

30 12

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(i) Show the results using a graph. (Hint: the horizontal scale is the distance pulled back and the vertical scale is the distance the car moves forward.)

(ii) From the graph, estimate the distance the car will move forward if it is pulled

back by 20 cm.

______________________________________________________________

(iii) Based on the graph, estimate how far the car is pulled back in order to move forward by 5 m.

______________________________________________________________

(c) What is the conclusion of the experiment? Does the hypothesis agree with the conclusion?

__________________________________________________________________

__________________________________________________________________

10. (a) Tommy tried to find out if hot water cools down faster in a container with a larger surface area. The following table shows the variables. Complete the table by filling in the blanks or circling the answer to help Tommy to do a fair test.

Variables Set-up A Set-up B

Container to be used 500 cm3 beaker (i) 100 cm3 beaker/ 500 cm3 beaker

Volume of water 100 cm3 (ii) _______________

Temperature of water at the beginning (iii) ______________ 50 oC

Place Under bright sunlight (iv) ______________

Covered with a lid? (iv) ______________ No

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(b) Describe the procedure of the experiment.

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

Miscellaneous Questions

1. Match the measurements on the left with the symbols of the units on the right.

Measurement Symbols of the units

(a) Temperature of ice water • • (i) cm

(b) Volume of orange juice • • (ii) kg

(c) Weight of a water melon • • (iii) cm3

(d) Length of a pencil • • (iv) min

(e) Time for an MTR train to go • • (v) oC from Central to Causeway Bay

2. Use the clues below to fill in the word puzzle and find out an instrument used in a laboratory.

(a) A pair of _____________ helps us pick up hot objects.

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(b) A test tube _____________ is to hold a test tube when heating.

(c) A _____________ can hold a large amount of solution.

(d) A _____________ is used to transfer a small amount of liquid.

(e) If the air hole is open when lighting the Bunsen burner, the gas may burn inside the _____________.

(f) It is put into the mouth of a test tube when we mix the solutions by shaking the test tube.

(g) A Bunsen burner should be placed on a heat-proof _____________.

(h) If chemicals get into our eyes, we should wash our eyes with distilled water from an eye wash _____________.

(i) We should wear safety _____________ to protect our eyes when heating.

(j) A _____________ bottle is used to store a solution.

(k) A wire gauze and a _____________ support beakers and conical flasks when heating.

(a) T O N G S

(b) H O L D E R

(c) B E A K E R

(d) D R O P P E R

(e) C H I M N E Y

(f) S T O P P E R

(g) M A T

(h) B O T T L E

(i) S P E C T A C L E S

(j) R E A G E N T

(k) T R I P O D

The instrument used in a laboratory is a _________________________.

3. Fill in the blanks and arrange the steps of lighting a Bunsen burner in the correct order.

I Open the (a) ______ _______ slowly to adjust the flame.

II Light a (b) _______.

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III Put the Bunsen burner on a (c) ______________ _______.

IV Connect the rubber tubing to the (d) ________ _______.

V Put the burning match over the (e) ______________ and turn on the gas tap.

VI Turn the (f) _____________ to close the air hole.

The correct order is:

_____ à _____ à _____ à _____ à _____ à _____ à _____

4. Peter is going to measure the volume of a stone with the apparatus listed below:

a measuring cylinder, a displacement can, a piece of thread

Draw a labelled diagram in the space provided to show how he can measure the volume of the stone.

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5. Complete the following concept map.

measures measures

can be studied through

(a)

identifying the (b) to be investigated

making a (c)

designing an experiment

carrying out an (d) ________

drawing a (e)

includes

for example

thermometer (h) _________

(i) ____________ temperature

time

involve

choosing the right (g) _____________

designing a (f) ______ _______

Science

interactive science 1a

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