AL MAJD INTERNATIONAL SCHOOL

REVISION WORKSHEET – FIRST TERM (2022-2023)

Subject: Science Class / Sec.: VII – ______

Name: ________________________ Date: _________________

Unit 1: Plants, Unit 2: Food & Digestion, Unit 6: States of Matter & Unit 10: Measuring Motion

I. Choose the correct answer:

1. The products of photosynthesis are:
a. Glucose and Oxygen
b. Oxygen and Carbon dioxide
c. Glucose and Nitrogen
d. None of the above

2. Identify choosing the correct option.

a. B shows the position of xylem in the roots
b. B shows the position of xylem in the stem
c. A shows the position of xylem in the roots
d. A shows the position of xylem in the stem

3. The function of waxy layer on the leaf is:

a. to make the leaf surface green
b. to prevent drying of the leaf
c. to trap the light
d. None of the above

4. Structure of the leaf that allow carbon dioxide to enter

a. Lower epidermis
b. Stomata
c. Air spaces
d. Palisade cells

5. Which nutrient helps to make strong skin?

a. Calcium
b. Protein
c. Vitamin C
d. Vitamin D

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6. Fig 1.1 shows a food chain. At which point, does photosynthesis takes place?

a. Hawk
b. Cricket
c. Grass
d. Spider

7. Which nutrient is needed to carry oxygen?

a. Calcium
b. Iron
c. Proteins
d. Vitamin C

8. The deficiency disease caused due to lack of Vitamin C

a. Anaemia
b. Rickets
c. Scurvy
d. Bended bones

9. Overweight and risk of developing heart disease can be increased, if a person intakes:

a. too much of proteins

b. too less of proteins
c. too much of fats
d. too less of fats

10. Only ________________ molecules can pass through the wall of alimentary canal.

a. Big
b. Small
c. complex
d. sharp

11. Suggest why Spaghetti turns blue-black with iodine solution:

a. Spaghetti contains sugar
b. Spaghetti contains starch
c. Spaghetti contains fat
d. None of the above

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12. Starch is digested by amylase to form simple sugars. An investigation is set up, as
shown in the fig. 4.1, which test tube will give a red colour with Benedict’s solution
after 20 minutes.

a. Test tube A
b. Test tube B
c. Both A and B
d. Neither A nor B

13. Which statement about enzymes is incorrect?

a. speeds up a reaction
b. High temperature stops its activity
c. gets changed itself during a reaction
d. large molecules are broken down by chemicals called enzymes

14. Material that is made of living cells and tissues is called

a. Biotic
b. Dry mass
c. Biomass
d. Living mass

15. The pancreatic juice helps in the digestion of which nutrients in the small intestine.
a. Vitamins and minerals
b. fibres , vitamins and proteins
c. water , fibres and fats
d. Carbohydrates ,fats and proteins

16. The undigested food is collected here and forms faeces in this organ.
a. Small intestine
b. large intestine
c. liver
d. Pancreas

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17. The teeth with a chisel shape and a sharp edge used for biting is called as
a. Molar
b. Incisor
c. Pre molar
d. Canine

18. Acid can dissolve which part of the tooth.

a. Pulp cavity
b. dentine
c. enamel
d. gum

19. This part of the teeth contains blood vessels and nerves:
a. Pulp cavity
b. Dentine
c. Enamel
d. Both A and B

20. A bus is traveling at an average speed of 220 km/hr. How far it travels in 3 hours?
a. 60 km
b. 600 km
c. 620 km
d. 660 km

21. The unit of speed is second/meter.

a. True
b. False

22. The distance covered by a body in unit time is called:

a. Distance
b. Time
c. Speed
d. None of the above

23. Which of these factors does not speed up diffusion?

a. Increasing temperature
b. Increasing size
c. Increasing concentration
d. None of the above

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24. Which car has the slowest speed?

a. A
b. B
c. C
d. D

25. The arrows represent the processes involved when matter changes state. Which
statement is incorrect?

a. A is melting
b. B is boiling
c. C is evaporation
d. D is freezing

26. What is the name of the process by which the gases move along the tube?

a. Brownian motion
b. Osmosis
c. Diffusion
d. None of the above

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27. Solids and liquids cannot be compressed (squashed into a smaller volume) because
a. The particles in both are too small to be seen.
b. The particles in both are touching each other with no spaces between.
c. The particles in both are too far from each other.
d. None of the above

28. Particle theory can be used to explain the properties of the three states of matter.
a. True
b. False

29. Property of gases that they share with liquids

a. Compressed
b. Flow
c. Definite Shape
d. Definite Volume

30. Gas pressure increases when a gas is made hotter

b. True
c. False

II. Do as directed:
1. The given figure shows the inside of a leaf. Identify the structures A – F in the given figure.

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2. Identify the given cell:

Ans: _______________________________________________________________

3. Identify the label line A, B, C, D, and E in the given figure of human digestive system.

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4. Label the structure of the incisor tooth:

5. The diagram shows how the arrangement of the particles changes when there is
a change of state. Identify A, B, C & D in the following diagram.

A - _________________________ B - _________________________

C - _________________________ D - _________________________

6. A train travels at an average speed of 80 km/hr. How long will it take to travel
between two stations which are 800 km apart? Show working.

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7. A ship is traveling at an average speed of 150 km/hr. Show working.
a) How far will it travel in 2.4 hours?

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b) How long will it take to travel between 2 ports 525 km apart?

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III. Define the following:

1. Enzyme:

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2. Digestion:

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3. Boiling:

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4. Condensation:

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5. Deficiency Disease:

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6. Balanced Diet:

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II. Give reasons:

1. Use particle theory to explain why solids and liquids cannot be compressed.

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2. Use particle theory to explain why liquid and gases can flow.

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3. Explain why a solid expands when it is heated.

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4. If a gas is forced into small space, what happens to the pressure?

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5. Explain why cars should travel more slowly in wet weather.

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III. Answer the following questions:

1. State the functions of roots.

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2. What is speed?

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3. What is use of the light gates?

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4. State the features of enzymes.

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5. What is Brownian motion? Give some examples.
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6. State the function and location of chlorophyll in a leaf.

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7. State the function of salivary glands.

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8. Use particle theory, to explain why pollen grains jiggle about faster when the
temperature is higher.

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9. Explain the essentials plants need for photosynthesis.

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IV. Answer the following questions briefly:

1. State the importance of fibre and water as a nutrient.

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2. What is diffusion? What are the factors affecting diffusion?

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3. What are the three factors that affect the gas pressure?

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4. List the kinds of nutrients found in different types of food.

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5. Explain the adaptations/features of leaf in a plant to do its function.

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6. State the functions of pancreas, stomach and small intestine.

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7. Differentiate between Constant Speed and Changing Speed with examples.

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