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NCERT Solutions for Class 7th Science Chapter 7 : Weather, Climate and Adaptations of Animals to Climate

CBSE NCERT Solutions for Class 7th Science Chapter 7 : Weather, Climate and Adaptations of Animals to Climate. NCERT Class 7 Science Solutions for Chapter 7. Class VII Science Solutions NCERT


NCERT Solutions for Class 7th Science Chapter 7 : Weather, Climate and Adaptations of Animals to Climate

Exercises

1. Name the elements that determine the weather of a place.

Answer

The elements that determine the weather of a place are:
(i) Temperature
(ii) Humidity
(iii) Rainfall
(iv) Wind speed

2. When are the maximum and minimum temperatures likely to occur during the day?

Answer

The maximum temperature during the day occurs at the afternoon while the minimum temperature occurs in the early morning.

3. Fill in the blanks:

(i) The average weather taken over a long time is called ___________.
(ii) A place receives very little rainfall and the temperature is high throughout the year, the climate of that place will be ___________ and ___________ .
(iii) The two regions of the earth with extreme climatic conditions are ___________ and __________.

Answer

(i) The average weather taken over a long time is called climate.
(ii) A place receives very little rainfall and the temperature is high throughout the year, the climate of that place will be hot and dry.
(iii) The two regions of the earth with extreme climatic conditions are the polar region and the desert.

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Page No: 78

4. Indicate the type of climate of the following areas:

(a) Jammu and Kashmir: _________________________________
(b) Kerala: ____________________________________________
(c) Rajasthan: __________________________________________
(d) North-east India: _____________________________________

Answer

a) Jammu and Kashmir → Moderately hot and wet
(b) Kerala → Hot and wet
(c) Rajasthan → Hot and dry
(d) North-east India → Wet

5. Which of the two changes frequently, weather or climate?

Answer

Weather changes frequently.

6. Following are some of the characteristics of animals:

(i) Diets heavy on fruits         (ii) White fur             (iii) Need to migrate           (iv) Loud voice
(v) Sticky pads on feet           (vi) Layer of fat under skin            (vii) Wide and large paws
(viii) Bright colours               (ix) Strong tails                  (x) Long and large beak

For each characteristic indicate whether it is adaptation for tropical rainforests or polar regions. Do you think that some of these characteristics can be adapted for both regions?

Answer

(i) Diets heavy on fruits → Tropical rainforests

(ii) White fur → Polar regions

(iii) Need to migrate → Polar regions

(iv) Loud voice → Tropical rainforests

(v) Sticky pads on feet → Tropical rainforests

(vi) Layer of fat under skin → Polar regions

(vii) Wide and large paws → Polar regions

(viii) Bright colours → Tropical rainforests

(ix) Strong tails → Tropical rainforests

(x) Long and large beak → Tropical rainforests

No, these characteristics can’t be adapted for both regions as they are specific.

7. The tropical rainforest has a large population of animals. Explain why it is so.

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Answer

The tropical rainforest has a large population of animals due to favourable climatic conditions and easy availability of different kinds of foods. The regions is hot and humid  with ample rainfall which supports the growth of animals and plants.

8. Explain, with examples, why we find animals of certain kind living in particular climatic conditions.

Answer

We find animals of certain kind living in particular climatic conditions because every living organisms are adapted to live in the particular habitat. Every living things develop their feature according to the adaption area.
For example, penguins have thick skin to protect themselves from cold and webbed feet to swim in water. It can’t able to survive the hot climate of tropical regions as they developed thick skin for the protection from cold not from the hot and humid temperature.

9. How do elephant living in the tropical rainforest adapt itself?

Answer

Elephant living in the tropical rainforest are well adapted itself to this region.
(i) They have strong sense of smell and uses its trunk for smell.and to hold food.
(ii) They also use their trunk to hold food.
(iii) They have long ears which help them in keeping cool in hot and humid climate.
(iv) Long ears help them in hearing very soft sound.
(v) They have thick padded feet which help them in moving silently.

Choose the correct option which answers the following question:

10. A carnivore with stripes on its body moves very fast while catching its prey. It is likely to be found in
(i) polar regions                       (ii) deserts
(iii) oceans                               (iv) tropical rainforests

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Answer

► (iv) tropical rainforests

11. Which features adapt polar bears to live in extremely cold climate?
(i) A white fur, fat below skin, keen sense of smell.
(ii) Thin skin, large eyes, a white fur.
(iii) A long tail, strong claws, white large paws.
(iv) White body, paws for swimming, gills for respiration.

Answer

► (i) A white fur, fat below skin, keen sense of smell.

Page No: 79

12. Which option best describes a tropical region?
(i) hot and humid
(ii) moderate temperature, heavy rainfall
(iii) cold and humid
(iv) hot and dry

Answer

► (i) hot and humid

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