NCERT PRACTICE QUESTIONS
1. Name the elements that determine the weather of a place.
Ans,.- Temperature, humidity, rainfall and wind speed.
2. When are the maximum and minimum temperatures likely to occur during the day?
Ans.- Maximum temperature occurs during afternoon whereas minimum temperature occurs early in the morning time.
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 __________.
Ans.- (i) called climate. (ii) hot and dry. (iii) polar region and tropical region.
4. Indicate the type of climate of the following areas:
(a) Jammu and Kashmir (b) Kerala - (c) Rajasthan - (d) North-east India -
Ans.- (a) moderately hot and wet (b) hot and wet (c) hot and dry (d) wet
5. Which of the two changes frequently, weather or climate?
Ans.- Weather changes frequently but not climate do not.
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 colors (ix) Strong tails (x) Long and large beak.
For each characteristic indicate whether it is adaptation for tropical rain forests or polar regions. Do you think that some of these characteristics can be adapted for both regions?
Ans. - (i) Tropical rain forests (ii) Polar regions (iii) Polar regions (iv) Tropical rain forests (v) Tropical rain forests (vi) Polar regions (vii) Wide and large paws – Polar regions (viii) Tropical rain forests (ix) Tropical rain forests (x) Tropical rain forests
7. The tropical rainforest has a large population of animals. Explain why it is so.
Ans.- Hot and humid temperature and continuous rainfall in the tropical rainforest proves to be suitable for the survival of many animals. Thus the tropical rainforest has a large population of animals.
8. Explain, with examples, why we find animals of certain kind living in particular climatic conditions.
Ans.- Animals have adapted themselves to survive in the conditions in which they live. Animals living in very cold and hot climate must possess special features to protect against the extreme cold or heat.
Example include- Polar bears have white fur so that they are not easily visible in the snowy white background. It protects them from their predators. It also helps them in catching their prey. To protect them from extreme cold, they have two thick layers of fur. They also have a layer of fat under their skin.
9. How do elephants living in the tropical rainforest adapt itself?
Ans.-
ü It uses the trunk as nose to have strong sense of smell.
ü The trunk is also used to pick food.
ü It has modified teeth tear the bark of trees which are food for elephants.
ü Large ears of the elephant help it to hear even very soft sounds.
ü Ears help the elephant to keep cool in the hot and humid climate of the rainforest.
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 rain forests
Ans.- (iv) tropical rain forests
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.
Ans.- (i) A white fur, fat below skin, keen sense of smell.
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
Ans.- (i) hot and humid.
Junior Science Topic - Weather, Climate And Adaptations Of Animals. Chapter notes, video lectures, power point presentation and NCERT exercise solution. (Class 7, CBSE syllabus, chapter 07)
By - EduPorm India - The Educational Platform
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