SCIENCE CHAP 7.Weather, Climate and Adaptations of Animals to Climate

 7.Weather, Climate and Adaptations of Animals to Climate

1. Choose the correct option.

 a) Which of the following instruments is used for measuring the relative

humidity of a place?R

 i) Hygrometer ii) Thermometer

 iii) Barometer iv) Rain gauge

ans: Hygrometer

 b) The black and white plumage of penguins helps them:U

 i) in swimming

 ii) to search for food on ground

 iii) to camouflage while swimming underwater

 iv) both (b) and (c)

ans: to camouflage while swimming underwater

 c) A macaque spends most of its time:R

 i) on tree tops ii) in the holes of trees

 iii) on the forest floor iv) in grasslands

ans: on tree tops

2. Give two examples for each of the following.U

 a) Animals of tropical rain forests.

ans: Red-eyed tree frog, lion-tailed macaques, toucans, elephants

 (examples may vary, accept all correct answers)

 b) Migratory birds

ans: Arctic Tern, Siberian crane

 (examples may vary, accept all correct answers)

 c) Animals that the polar bear feeds on.

ans: Seals, walruses, fishes

(examples may vary, accept all correct answers)

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3. State whether the following statements are true or false. Correct the false

statements by changing the underlined words.U

 a) In polar bears, the papillae act as an insulating material protecting the bear

from extreme cold.

ans: False, In polar bears, the blubber acts as an insulating material

protecting the bear from extreme cold.

 b) The climate of a place depends upon the altitude of the place above sea

level.

ans: True

 c) In tropical rainforests, most of the trees are broad-leaved and hardwood

evergreens.

ans: True

 d) The trunk ofan elephant is formed by the fusion of nose and tusk.

ans: False, The trunk ofan elephant is formed by the fusion of nose and the

upper lip.

4. In following questions, the Assertion and Reason have been put forward. Read

the statements carefully and choose the correct alternative from the

following:An/E

(A) Both Assertion and Reason are true and the Reason is a correct explanation of

the Assertion.

(B) Both Assertion and Reason are true but the Reason is not a correct explanation

of the Assertion.

(C) Assertion is true but the Reason is false.

(D) Both Assertion and Reason are false.

 a) Assertion:Red-eyed tree frogs have bright, leaf green bodies with yellow

and blue stripes.

Reason:The bright colours are used as a defence mechanism.

ans: (A) Both Assertion and Reason are true and the Reason is a correct

explanation of the Assertion. 

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 b) Assertion:The understoreylayer of tropical rainforests is made up of plants

adapted to grow in low sunlight.

Reason:The understoreylayer isthe darkest and most humid layer of a

tropical rainforest.

 (B) Assertion is true but the Reason is false.

5. Give reasons for the following statements:An

a) Regions with higher temperature have more humidity than cooler regions.

ans: When air in a region gets heated, it expands and holds more moisture.

b) Polar bears have white fur on their body.

ans: The white colour of the fur helps them to camouflage themselves in the

snow, protects them from predators and helps them to catch their prey.

 c) Birds living in polar regions migrate during winter.

ans: As most birds are not adapted to the harsh cold, they migrate to

warmer regions during winters.

6. Define the following: R

 a) Adaptation

ans: The changes in the body and behaviour of organisms that enable them

to survive in their environment are known as adaptation.

 b) Migration

ans: The seasonal movement of animals from one place to another is called

migration.

c) Meteorology

ans: The study of weather is called meteorology.

 

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7. Answers the following questions in brief:

a) What does a meteorologist do? U

ans: A meteorologist prepares weather reports that inform us about the

dailyweather in different parts of the world.

b) Name the following:R

(a) the polar region around the North Pole

(b) the polar region around the South Pole

ans: (a) Arctic

(b) Antarctic

c) What are the wings of penguins known as? What are they modified for?U

ans: The wings of penguins are known as flippers. They are modified for

underwater swimming.

8. Observe the picture given blow and answer the questions that follow:R

a) Identify the bird in the above picture.

ans: Siberian crane

b) How do these birds get energy to fly long distances?

ans: These birds store extra fat which acts as a source of energy helping them

to fly long distances.

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9. Collectinformation about humidity, daily minimum and maximum temperatures of

your city/town for five days. Also collect the same information for any other

city/town. Use newspapers or the internet to collect the data. Compare the collected

data and conclude which of the two cities/towns is warmer/cooler and more

humid/less humid.An/E

Day Name

of your

city

Max

temp

(°C)

Max

temp

(°C)

Humidity

(%)

Name of

the city

compared

Max

temp

(°C)

Max

temp

(°C)

Humidity

(%)

Day 1

Day 2

Day 3

Day 4

Day 5

Conclusion :

10. Complete the boxes with the help of the clues provided:Ap

a) An instrument used to measure wind speed.

b) A layer of fat under the skin to insulate the body of animals in polar regions.

11. Higher Order Thinking Skills (HOTS)

It is difficult to predict the weather of a place while it is easer to predict its climate.

Give reason.An/E

ans: Weather of a place can vary over a short period of time. Hence it is difficult to

predict weather. It is easier to predict climate as it is the average weather

pattern taken over a long time.

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