NCERT Solutions Class 7 Science
The NCERT Solutions in English Language for Class 7 Science Chapter – 7 (Weather, Climate and Adaptations of Animals to Climate) has been provided here to help the students in solving the questions from this exercise.
Chapter – 7 (Weather, Climate and Adaptations of Animals to Climate)
1. Name the elements that determine the weather of a place.
Answer – The elements that determine the weather of a place are temperature, humidity, rainfall, and wind speed.
2. When are the maximum and minimum temperatures likely to occur during the day?
Answer – The maximum temperature of the day occurs in the afternoon while the minimum temperature occurs early in the 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 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: _____________________________________
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 but not climate
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 rain forests
(ii) White fur – Polar regions
(iii) Need to migrate – Polar regions
(iv) Loud voice – Tropical rain forests
(v) Sticky pads on feet – Tropical rain forests
(vi) The layer of fat under skin – Polar regions
(vii) Wide and large paws – Polar regions
(viii) Bright colours – Tropical rain forests
(ix) Strong tails – Tropical rain forests
(x) Long and large beak – Tropical rain forests
7. The tropical rainforest has a large population of animals. Explain why it is so.
Answer – The climate of tropical rainforests is generally hot and humid with continuous rain. These hospitable climatic conditions support huge populations of plants and animals.
8. Explain, with examples, why we find animals of certain kind living in particular climatic conditions.
Answer – Certain kind of animals can be found in particular climatic conditions as they can adapt well to those conditions.
Example – 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. In fact, they are so well-insulated that they have to move slowly and often rest to avoid getting overheated.
9. How do elephants living in the tropical rainforest adapt itself?
Answer – An important and widely found animal of Indian tropical rainforests is the elephant. It has adapted remarkably to the conditions of this region. Some of the adaptations are as follows.
(i) It uses its trunk as nose so that it has a strong sense of smell.
(ii) Its trunk is also used for picking up food.
(iii) Its tusks are used to tear bark of trees. It can eat barks of trees.
(iv) Its large ears have strong sense of hearing.
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
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.
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.
