science revision primary 4 (autosaved)

8/13/2019 Science Revision primary 4 (Autosaved)

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Science revision- Primary 4

Date:

1. What is Air?

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2. Give 3 properties of air?

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3. Why is air important?

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4. What is atmosphere?

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5. Why is atmosphere important?

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6. Air is made up of what?

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7. What does air contain?

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8. What gas contains a variable amount in air?


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9. Define System?

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10.Give 3 examples of natural systems?

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11.Give 3 examples of man- made systems?

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12.Complete the below Approximate composition of Air table.Gas Percentage

13.Define wind?

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14.When the air blows faster, what happens to the wind?

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15.What forms with the fastest and strongest wind? What are the effects of it?

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16.Give examples to show that air is around us?

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17.Why an area near the lake does have more water vapour in the air than a desert area?

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18.Where do we find air?

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19.Why are the plants and animal able to live in water?

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20.Animals such as , earthworm and . live underground get air from the soil.21.Why do animals and plants cannot live on the moon?

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22.Where is air present in the soil?

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23.Give uses of nitrogen?..

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24.Give 3 uses of carbon dioxide.


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25.Give 2 uses of oxygen...

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26.Raju puts burning candle into each of the gas jars containing different gases. Please draw thediagram below and answer the questions.

Oxygen Carbon dioxide air

What do you think will happen to each candle?

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27.How do plants and animals breathe? Fill in the blanks.1. Plants and animals need . to carry out life process called ...... 2. During respiration, . is released from food consumed so that they can .

and

3. ..... is given off as one of the . products during 4. The air we contains .. than the air we

breathe in.

5. When .. water comes into .. with carbon dioxide, it turnsmilky or chalky.

6. Gases such as . and enter or leave through tinyholes called

7. The stomata lets and out when the leaf is not mak ingfood at ..


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8. When a plant is making food, . Enters the plants and excess .goes out through

9. The .. open and close to let the gases and 10... is needed at all times for ..

28.Where is stoma present in plant? Draw the diagram with the answer.

29.Fish breathe by using ..30.Describe gills.

31.Where are the gills found?..

32.What happens water passes over the gills of a fish?

33.Water that enters the mouth of a fish has more .. and less .34.Water that leaves the mouth of a fish has less . and more35.. is known as a fish out of a water and it is commonly found in

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36.How do mudskippers breathe?


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37.Mammals breathe by using ..38... connected to by the nose and mouth.39.Air enters or leaves the . Of a mammals through40. is the air that breathe in is absorbed by .. inthe lungs.41. leaves the blood vessels in the lungs and goes out into the . we

breathe out.

42.. like whales, purpoises, dolphins, dugongs and seals have to come out ofthe water.

43.A .. which is actually a type of whaleshas a nostril called .44. Living things Breathing parts

Elephant .

Seacow ..

Shark

Sun flower

Garoupa .

Grass .

Sea bass .

45.Draw a human respiratory system.


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46.Nose:.47.Mouth:48.Windpipe:

....

49.Air tubes:50.Lungs:

51.Name some diseases that affect our respiratory system...

52.Compared to the air we breathe in, the air we breathe has less .,more .. and some amount of nitrogen.

53.The oxygen we breathe in is used for during which .. isproduced.

54.Nitrogen is neither up nor produced during .., hence the amountremains the same.

55.The . Branches into two air tubes in the lungs. These two tubes ..out into many . tubes that ends in a willon of air sacs.

56.These .. are surrounded by many tiny vessels. 57. from the air that we breathe in from air sacs into the blood. 58. passes out of the blood into air sacs into the air we breathe out

through air

59.Why do plants need transport system?

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60.What is the function of leaves?

61.What is the function of roots?..

62.Plants grow .. to reach maximum sunlight. Plants .. forsunlight to prepare food.

63.Describe the transport system in plants.


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Draw the diagram of transport system?

64.Why does our body need transport system?

65.The transport system in humans is called the 66.Circulatory system is made up of , ., ..67.What is the function of blood in our body?

68.Blood flows in our body in the blood vessel.


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Blood Vessels

69. Blood flows through all parts of our body through tubes called . 70.Oxygen rich blood is carried from the .. through a blood vessels.71.These blood vessels branch out like a tree and they get .. and .. at

each branch

72.Name the three types of blood vessels?1-

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2- ..

3- ..

73.Draw the process of blood flow from heart to veins74.Write down the similarities between plant and human transport system/


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75.Write down the differences of transport system in plant and HumanPlant Transport System Human Transport System

76.Define / explain the following systems.

Digestive

system:

Circulatory

System

.

Respiratory

system

77.Draw the respiratory system and label it

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science revision primary 4 (autosaved)

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