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131534

7 8 9610 100 1000

+ + +

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38

48

45

12

58

2 719 19

+

199

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519

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7 18 8− =

58

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6

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Difference of numerators= Common Denominator

4 7 915 10 10+ =

1 3 1 4____2 4 4 4+ +

5 4 9 1____7 7 7 7+ +

1 7 3 1____4 8 8 2+ +

23

15

35

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4510

0.4510

45100

0.45100

7 4210 100

+ +92

100

5210

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–

2 9 .0 5

1 3 .3 1

+

5 1 .3 2 6

2 5 .1 5 4

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×

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3

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4

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Reasons for Civilisations to developaround the river valleys

A: B: C: D:

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8. When a chemical substance is formed due to chemical change, then this can be indicated bya. Melting of a substance

b. Cooling of a substance c. Breaking of a substance d. Change in the colour of a substance

Classify the following as Physical and Chemical changes

Breaking of glass, Rusting of a nail, Burning a piece of paper, Sublimation of dry ice, Zinc reacts with hydrochloric paper, Sublimation of dry ice, Zinc reacts with hydrochloric paperacid, Iron nails mixed with sulphur powder, Burning of coal, Beating aluminum to aluminum foil

Physical Canges Chemical ChangesPhysical Canges Chemical ChangesPhysical Canges Chemical Changes

9. 13.

10. 14.

11. 15.

12. 16.

State whether the following statements are true or false:

17. A chemical change can be easily reversed. A chemical change can be easily reversed. A

18. In a physical change the chemical composition of a substance changes.

19. Energy is released or absorbed during achemical change.

20. Powdering sugar crystals is an example ofphysical change.physical change.physical change.physical change.physical change.physical change.physical change.Powdering sugar crystals is an example of20.20. Powdering sugar crystals is an example ofPowdering sugar crystals is an example of20.

chemical change. chemical change. chemical change. chemical change. 19.19. Energy is released or absorbed during aEnergy is released or absorbed during aEnergy is released or absorbed during aEnergy is released or absorbed during aEnergy is released or absorbed during aEnergy is released or absorbed during aEnergy is released or absorbed during aEnergy is released or absorbed during aEnergy is released or absorbed during aEnergy is released or absorbed during a19.

substance changes.substance changes.substance changes.substance changes.In a physical change the chemical composition of a 18.18. In a physical change the chemical composition of a 18.

17. chemical change can be easily reversed. chemical change can be easily reversed. chemical change can be easily reversed. chemical change can be easily reversed. chemical change can be easily reversed. chemical change can be easily reversed. chemical change can be easily reversed. chemical change can be easily reversed. AA chemical change can be easily reversed. A17. chemical change can be easily reversed. 17.

State whether the following statements are true or false:State whether the following statements are true or false:State whether the following statements are true or false:State whether the following statements are true or false:State whether the following statements are true or false:

16.16.12.12.12.

15.11.11.

14.10.10.10.

13.13.9.

Physical Canges Chemical ChangesPhysical Canges Chemical ChangesPhysical Canges Chemical ChangesPhysical Canges Chemical ChangesPhysical Canges Chemical ChangesPhysical Canges Chemical ChangesPhysical Canges Chemical Changes

coal, Beating aluminum to aluminum foil acid, Iron nails mixed with sulphur powder, Burning of

, Sublimation of dry ice, Zinc reacts with hydrochloric , Sublimation of dry ice, Zinc reacts with hydrochloric paperpaper, Sublimation of dry ice, Zinc reacts with hydrochloric paperpaperpaperpaperpaper, Sublimation of dry ice, Zinc reacts with hydrochloric paper, Sublimation of dry ice, Zinc reacts with hydrochloric paperBreaking of glass, Rusting of a nail, Burning a piece of Breaking of glass, Rusting of a nail, Burning a piece of Breaking of glass, Rusting of a nail, Burning a piece of Breaking of glass, Rusting of a nail, Burning a piece of

Classify the following as Physical and Chemical changesClassify the following as Physical and Chemical changesClassify the following as Physical and Chemical changesClassify the following as Physical and Chemical changesClassify the following as Physical and Chemical changes

Change in the colour of a substance Change in the colour of a substance d. Change in the colour of a substance d.Breaking of a substanceBreaking of a substancec. Breaking of a substancec.Cooling of a substanceCooling of a substanceb. Cooling of a substanceCooling of a substanceb.Melting of a substanceMelting of a substancea. Melting of a substancea.

chemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated bychemical change, then this can be indicated byWhen a chemical substance is formed due to 8. When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to When a chemical substance is formed due to 8.

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11. Which of the following is not a migratory bird? a. Humming bird c. Arctic tern

b. Siberian crane d. Parakeet

12. Camouflage is a characteristic feature of a. Monkeys c. Crows b. Chamelons d. Penguins

Match the following:

Column A Column B

13. Sticky pads on feet a. Migration13. Sticky pads on feet a. Migration

14. Inactivity in animals during winter b. Polar bear

15. Bright Colours c. Red eyed-frog15. Bright Colours c. Red eyed-frog

16. Movement of animals from one place to another

d. Camouflage

e. Hibernation

f. Rainforest birds.

State whether the following statements are true or false:

17. All animals undergo hibernation in summer.

18. In cold climates animals adapt to conserve body heat.

19. Temperature on the earth’s surface increases Temperature on the earth’s surface increases Twith increasing latitude.

20. It is warmer in plains as compared to hills, as the air is thicker in the plains. the air is thicker in the plains. the air is thicker in the plains. the air is thicker in the plains. the air is thicker in the plains. the air is thicker in the plains. the air is thicker in the plains. the air is thicker in the plains. the air is thicker in the plains. the air is thicker in the plains. the air is thicker in the plains.

20.20. It is warmer in plains as compared to hills, as It is warmer in plains as compared to hills, as It is warmer in plains as compared to hills, as It is warmer in plains as compared to hills, as It is warmer in plains as compared to hills, as It is warmer in plains as compared to hills, as It is warmer in plains as compared to hills, as It is warmer in plains as compared to hills, as It is warmer in plains as compared to hills, as It is warmer in plains as compared to hills, as 20.

with increasing latitude. with increasing latitude. with increasing latitude. with increasing latitude. with increasing latitude. with increasing latitude. with increasing latitude. emperature on the earth’s surface increases 19.19. emperature on the earth’s surface increases Temperature on the earth’s surface increases Temperature on the earth’s surface increases Temperature on the earth’s surface increases Temperature on the earth’s surface increases Temperature on the earth’s surface increases 19.

body heat. body heat. body heat. 18.18. In cold climates animals adapt to conserve In cold climates animals adapt to conserve In cold climates animals adapt to conserve In cold climates animals adapt to conserve In cold climates animals adapt to conserve In cold climates animals adapt to conserve In cold climates animals adapt to conserve In cold climates animals adapt to conserve 18.

17. All animals undergo hibernation in summerAll animals undergo hibernation in summerAll animals undergo hibernation in summerAll animals undergo hibernation in summerAll animals undergo hibernation in summerAll animals undergo hibernation in summerAll animals undergo hibernation in summerAll animals undergo hibernation in summerAll animals undergo hibernation in summerAll animals undergo hibernation in summerAll animals undergo hibernation in summer17. All animals undergo hibernation in summer. 17.

State whether the following statements are true or false: State whether the following statements are true or false: State whether the following statements are true or false:

f. Rainforest birds.f. Rainforest birds.f. Rainforest birds.

e. Hibernatione. Hibernatione. Hibernatione. Hibernatione. Hibernation

d. Camouflaged. Camouflaged. Camouflaged. Camouflage another another from one place to from one place to16. Movement of animals16. Movement of animals

15. Bright Colours c. Red eyed-frog15. Bright Colours c. Red eyed-frog

b. Polar bearb. Polar bearb. Polar bearb. Polar bearb. Polar bear during winter during winter during winter during winter14. Inactivity in animals14. Inactivity in animals

13. Sticky pads on feet a. Migration13. Sticky pads on feet a. Migration13. Sticky pads on feet a. Migration13. Sticky pads on feet a. Migration

Column BColumn AColumn A

Match the following:

Chamelons Penguins Penguins d.Chamelonsb. Penguins Chamelons Penguins d.b.Crows MonkeysMonkeys Crows c.Monkeysa. Crows Monkeys c.a.

Camouflage is a characteristic feature of Camouflage is a characteristic feature of Camouflage is a characteristic feature of Camouflage is a characteristic feature of 12.12. Camouflage is a characteristic feature of 12.

Siberian crane Parakeet Parakeet d.Siberian craneb. Parakeet Siberian crane d.b.Arctic tern Arctic tern Humming birdHumming birdHumming birdHumming birdHumming bird Arctic tern c.Humming birda. Arctic tern Humming bird c.a.

Which of the following is not a migratory bird? Which of the following is not a migratory bird? 11.11. Which of the following is not a migratory bird? Which of the following is not a migratory bird? Which of the following is not a migratory bird? Which of the following is not a migratory bird? 11.

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