NCERT Solutions for Class 7 Science Chapter 7 Weather Climate and Adaptations of Animals to Climate
Question:- 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.
Question:- 2. When are the maximum and minimum temperatures likely to occur during the day?
Answer:- Maximum temperature occurs during day time, specifically in the afternoon whereas minimum temperature occurs during early in the morning.
Question:- 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.
Question:- 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 climate
(b) Kerala: hot and wet climate
(c) Rajasthan: hot and dry climate
(d) North-east India: wet climate
Question:- 5. Which of the two changes frequently, weather or climate?
Answer:- Weather changes frequently not the climate.
Question:- 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
Question:- 7. The tropical rainforest has a large population of animals. Explain why it is so.
Answer:- The tropical rainforest’s hot, humid climate and constant rainfall are ideal for many creatures’ survival; as a result, the tropical rainforest has a high animal population.
Question:- 8. Explain, with examples, why we find animals of certain kind living in particular climatic conditions.
Answer:- Animals have evolved to survive in the environments they dwell in. Evolution has given them characteristics and habits that enable them adapt to their surroundings. As a result, animals must have certain adaptive traits in order to exist in a particular sort of climate. This is why we see various species of animals living in specific environmental settings. Animals in the arctic regions, for example, have adapted to the intense cold. They have unique qualities like as white fur, a keen sense of smell, a layer of fat beneath the skin, and broad and wide paws for swimming and walking in the snow, among others.
Question:- 9. How do elephant living in the tropical rainforest adapt itself? Choose the correct option which answers the following question:
Answer:- The elephant has adapted to the rainforest’s surroundings in a variety of ways. It has a powerful sense of smell since it has a trunk that it uses as a nose. It uses its trunk to gather up food as well. Its tusks are teeth that have been modified. These may rip the bark off trees, which an elephant enjoys eating. As a result, the elephant is well-equipped to deal with the competition for food. Elephants have large ears that allow them to hear even very mild sounds. They also assist the elephant in staying cool in the rainforest’s hot humid conditions.
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
Question:- 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:- (iv) White body, paws for swimming, gills for respiration.
Question:- 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