alva academy s1 science homework...

S1 Homework Booklet

Alva Academy

S1 Science Homework Booklet

Remember: if you have problems with the

homework ask your teacher for help before

the day the homework is due.

S1 Homework Booklet

Biology 1 – Under the Microscope

Homework B1.1

1. Copy and complete the following table.

Part of the Flower Letter on diagram

A Style

B

C

D Filament

E Petal

F

G

H Sepal

I Ovary

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2. Describe the function of the petal?

3. Name which part of the flower

produces the male gamete (pollen)?

4. Name which part of the flower

produces the female gamete (ovule)?

5. Describe the function of the sepal?

6. Describe the process of pollination and

fertilisation in plants.

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Homework B1.2

1. State which method of dispersal would

be used by the seed shown below? Give

reasons for your answer.

2. A pupil wants to set up an experiment

to investigate if light is required for

germination. Describe an experiment

that the pupil could set up. Make sure

you include how this would be made a

fair test.

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3. From this experiment the pupils found

out that in the light 50 out of the 70

seeds germinated. What is the

percentage of seeds that germinated?

4. State the three factors required for a

seed to germinate.

5. Use the table below to plot a graph

showing the effect of temperature on

germination.

Temperature (°C) % Germination

0 0

5 4

18 60

27 80

34 10

40 0

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Homework B1.3

1. Plants have many different uses which

make them vital to sustaining life on

Earth. Some plants such as poppy can

be used to make medicines such as

painkillers. Others, such as fruit and

vegetables, provide a good source of

food. Wood from trees has two main

uses. It can be cut down and used as a

fuel or it can be used as a material to

construct buildings.

Present this information in a table using

the headings ‘Use’ and ‘Example’.

2. Look at the following food chain and

answer the questions below.

Leaves Slug Frog Heron

a) Identify the producer in the chain

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b) What do the arrows represent in the

chain?

2. In an investigation into the rate of

photosynthesis, a piece of Elodea

(pondweed) was placed in a beaker of

water and a bright light shone on it.

Bubbles of oxygen given off by the

Elodea were counted. This was repeated

with the lamp at different distances

from the Elodea.

A graph of the results in shown.

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a) What was the rate of bubbling when

the lamp was at a distance of 200mm

from the Elodea ?

______________ bubbles per minute

b) What distance between the lamp and

the Elodea would give a rate of bubbling

of 5 bubbles per minute?

_______________ mm

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Chemistry 1 – Fireworks

Homework C1.1

Your task is to find out about the gases

that are found in the air. You must find

out all of the following for the three main

gases in air.

The name of each gas.

The percentage of each gas in air.

Present this information as a table, pie

chart or bar graph.

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Homework C1.2

Your task is to find out about one

element and produce an A4 sheet about

this element. This could be hand written

or typed and include both text (writing)

and pictures.

You must include all the following:

What the element looks like

What the element is used for,

What are the elements properties

(how it reacts/behaves etc)

Any other interesting information.

This information should be clearly

presented in an attractive way.

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Homework C1.3

You must research fireworks and produce

a pamphlet about them. You should include

the following:

History of fireworks

What fireworks contain

Safety

Any other interesting facts.

Make sure your pamphlet is clear, concise

and in your own words. It should be about

two sides of A4 paper.

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Physics 1 – The Great Beyond

Homework P1.1

On the A4 paper provided, draw a diagram

of how the planets are arranged in our

Solar System. You must include the Sun

and have the planets in the correct order.

On your diagram, mark the area where

the coldest planets are and the area

where the hottest planets are.

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Homework P1.2

1. On the A4 paper provided, draw a

diagram Complete the following ray

diagrams to show the path taken by

the rays of light;

2. What happens to a ray of white light

when it passes through a triangular

prism?

3. How can we use this to study distant

stars?

4. What shape of lens is used in

telescopes?

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Homework P1.3

1. How long has mankind been studying

the stars and planets?

2. In which years did the following

happen:

a) The first telescope was invented

b) The first man went into space

c) The voyager probe studies Neptune.

3. What causes objects to feel heavy on

the surface of a planet?

4. What would happen to the weight of

an object if it was on a planet much

larger than Earth?

5. What are the needs for life to exist

on a planet?

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Biology 2 – Microbes and Diseases

Homework B2.1

Collect the cut out from your teacher and

follow the instructions to make a ‘model’

of the inside of a humans body.

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Biology 2 – Microbes and Diseases

Homework B2.2

Find out which vaccinations you or a

member of your household has received.

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Biology 2 – Microbes and Disease

Homework B2.3

Read the following article about penicillin

then answer the questions in complete

sentences in your jotter.

Sir Alexander Fleming (1881 –

1955) was born in Ayrshire. He

discovered penicillin (in 1928)

after leaving some petri dishes

with bacteria on, in a sink in his

laboratory, whilst he went on a 2

week holiday.

When he returned the bacteria on

the petri dishes had grown, but

there was also a yellow green

mould that had accidentally

contaminated the Petri dish. To

his surprise Fleming noticed a

clear halo without any bacteria

surrounding the yellow-green

growth of the mould.

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The Staphylococcus bacteria had grown, covering the entire plate, except for the area surrounding the moldy contaminant. Fleming correctly concluded that the mould must have released a substance that had inhibited the growth of the bacteria. He discovered that the antibacterial substance was not produced by all moulds, only by strain of Penicillium notatum. He named the active substance “penicillin”. It wasn’t until 1940 that penicillin started to be made in large enough quantities to treat ill patients. The scientists, Howard Florey and Ernst Chain found Fleming’s work with penicillin and discovered a way to make enough of the chemical to treat patients. Florey deliberately injected eight mice with deadly bacteria. 4 of the mice were given penicillin and 4 were not.

The 4 mice that had been given penicillin survived, the

others died after 15 hours.

Howard Florey Ernst Chain

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The first human to be treated was Albert Alexander, a

policeman who was dying of a very serious bacterial

infection. He started to improve after being given

penicillin, however supplies of the drug ran out and the

man eventually died.

The two scientists eventually worked out a way to make

large amounts of penicillin and, as a result, it saved many

soldiers’ lives during World War II.

Fleming, Florey and Chain all received the Nobel Prize for

Medicine in 1945 for their work with Penicillin.

Homework Questions

1 Write a definition for ALL the words underlined in this article.

2 What type of micro organism made the chemical that killed the bacteria on the plate?

3 What is the scientific name of the mould that grew on the plate?

4 What happened to the mice that were not given penicillin?

5 Why do you think the discovery of penicillin was so important?

Penicillin mould Staphylococcus bacteria

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Chemistry 2 – Crime and Chemistry

Homework C2.1

Read the following information about the

Scottish Chemist Sir William Ramsay

(1852 – 1916). Record in a table, all the

solids, liquids and gases mentioned.

William Ramsay was born on

October 2nd 1852, in Glasgow,

Scotland; this was nearly fifty

years before Glasgow had

running tap water! William

Ramsay became interested in

chemistry when he read about gunpowder

manufacture in a textbook, and he began attending

lectures on chemistry and physics as a result.

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In 1785 English chemist Henry

Cavendish suggested that, in addition

to nitrogen, oxygen, carbon dioxide,

and water vapour, air might contain

another gas. Henry Cavendish had

earlier discovered hydrogen when he

added metals, including zinc, iron and nickel to

various dilute acids including sulphuric acid, nitric

acid and hydrochloric acid. He collected the gas

produced in each reaction.

In 1892 Lord Rayleigh (John

William Strutt) found that

nitrogen prepared from ammonia

gas was less dense than

nitrogen gas prepared from air.

Ramsay believed that nitrogen from air might

contain a denser gas. In large-scale experiments he

passed nitrogen over hot magnesium, which

reacted to form solid magnesium nitride and left

http://upload.wikimedia.org/wikipedia/commons/6/64/Cavendish_Henry_signature.jpg

http://en.wikipedia.org/wiki/File:John_William_Strutt.jpg

S1 Homework Booklet

behind a small amount of unreactive gas. At the

same time, Rayleigh repeated Cavendish's

experiments and confirmed the presence of an

unknown gas.

On August 13, 1894, Rayleigh and Ramsay

announced their discovery of a new element in the

atmosphere to the British Association at Oxford.

Because of its unreactivity, they later called the gas

argon, from the Greek word meaning "lazy."

Ramsay suggested that argon be placed within a

new group of elements in the Periodic Table,

between chlorine and potassium. In 1895 Ramsay

and, independently, Per Theodor Cleve and Nils

Abraham Langlet in Sweden, discovered helium.

Also in 1895, Ramsay and the English chemist

Morris W. Travers discovered the inert gases

krypton (from the Greek, meaning "hidden"), neon

(from the Greek, meaning "new"), and xenon (from

the Greek, meaning "stranger").

In 1904 Ramsay received the Nobel Prize in

chemistry "in recognition of his services in the

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discovery of the inert gaseous elements in air, and

his determination of their place in the periodic

system," becoming the first British recipient of this

award.


Homework C2.2

Look at the list of substances below. You

must find out which of these are pure and

which are mixtures. You could use books,

web sites and information found on labels

on the substances to help you.

Milk Shampoo

Cola Aluminium

Copper Oxygen

Air Bronze

S1 Homework Booklet


Homework C2.3

You must research rock salt and produce

a pamphlet about it. You should include

the following:

Where do we get rock salt from and

how do we collect it?

How is rock salt separated

industrially

Which different substances are

found in rock salt and what are they

used for?

Any other interesting facts.

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Make sure your pamphlet is clear, concise

and in your own words. It should be about

two sides of A4 paper.

Physics 2 – Electricity

Homework P2.1

1. Write down your five favourite leisure

activities.

2. Of these five activities, can you do any

of them without electricity?

3. On a sheet of paper either:

a) Draw an activity you enjoy that

needs electricity.

OR

b) Do a poster listing important or

enjoyable activities that need

electricity. You don’t have to

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include drawings on your poster; but

you can.


Homework P2.2

1. Describe what is meant by an

electric current.

2. Name the two types of electric

charge.

3. Describe what happens when two

charges that are the same type are

brought together.

4. Describe what happens when two

charges that are opposite types are

brought together.

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5. Make a list of three electrical

conductors and another list of three

electric insulators.


Homework P2.3

1. Draw the electrical symbols for:

a) a lamp

b) a resistor.

c) an ammeter.

d) a motor.

2. Draw a circuit diagram with a

battery, a lamp, a switch, and an

ammeter (in series).

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3. Explain why your hands should not

touch an electrical appliance with

wet hands.

4. What happens to the brightness of

lamps in a series circuit if you add

more lamps.

5. What type of circuit keeps lamps

bright even if you add more?

S1 Homework Booklet


Homework P2.4

1. What units are electric currents

measured in?

2. What can you say about the current

in different places in a series

circuit?

3. What can you say about voltages in

different branches of a parallel

circuit?

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