Class 7 Science Chapter 7 | Weather, Climate and Adaptations of Animals to Climate

Here are expected questions from Chapter 7 of NCERT Class 7 Science Textbook. You can find textbook solutions of this chapter here.

1. What is humidity?

Humidity is the measure of moisture in the air.

2. Who prepares the weather reports?

The Meteorological Department of the Government prepares the weather reports.

3. What instrument is used to measure the rainfall?

Rain gauge

4. What is a rain gauge?

A rain gauge is a measuring cylinder with a funnel on top to collect rainwater. It is used to measure rainfall.

5. What is the weather at a place?

Weather is the day-to-day condition of the atmosphere at a place with respect to temperature, rainfall, windspeed, humidity etc.

6. What are the elements of weather?

Temperature, humidity, windspeed, rainfall and other factors are the elements of weather.

7. What is the main cause of changes in weather?

Sun

8. What are the factors determining the weather at a place?

Sun is the primary source of energy that causes changes in the weather. The solar energy absorbed and reflected by the land, oceans and atmosphere determine the weather at a place.

9. What is the climate of a place?

Climate is the average weather pattern of a place taken over a long time.

10. In Kerala, the climate is ……………………………

hot and wet

11. The desert climate is ………………………….

hot and dry

12. Name some countries belonging to the polar region

Canada, Greenland, Norway, Sweden, Iceland, Siberia in Russia and Alaska in the US.

13. Countries where the tropical rain forests are found

India, Indonesia, Malaysia, Brazil, Uganda, Nigeria, Kenya and Congo.

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14. How are polar bears adapted to their climates?

Polar bears have white fur that is not easily visible in the white snowy background. Thus, the fur not only protects them from their predators but also helps them to catch their prey easily by making them nearly invisible. They have two thick layers of fur to survive in the extreme cold. They also have a layer of fat under their skin. Actually, they are so insulated that they have to move slowly and rest frequently to avoid getting overheated. Polar bears have a strong sense of smell that helps them to catch their prey easily. Their long, sharp and curved claws help them walk on ice.

15. How are penguins adapted to live in their cold climates?

Penguins are white and can easily merge with their white background. They have a thick skin and lot of fat to protect them from cold. Penguins also have the habit of huddling together to keep themselves warm.

16. Name some animals found in polar regions

Polar bears, penguins, reindeers, musk oxen, fish, foxes, seals, whales and birds

17. How do birds survive in the extreme cold of polar regions?

Birds in polar regions cannot survive in the extreme cold. Hence, they migrate to warmer regions when winter sets in the poles. Actually, they may travel as much as 15,000 kms every year to reach warmer places. Siberian cranes are an example of this. They fly all the way from Siberia to places like Bharatpur in Rajasthan and Sultanpur in Haryana.

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18. What is the climate like in tropical regions?

Tropical regions are close to the equator. Hence, they have a hot climate.

19. In which region are days and nights almost equal in length?

Tropical regions

20. Write a brief note on tropical forests

Tropical regions are famous for their large forests. These regions are warm and receive abundant rainfall. The warm and wet conditions in these regions support a variety of plants and animals. Actually, more than half of the animal life and two-thirds of flowering plants are found in rainforests. Common animals found in rainforests are elephants, monkeys, apes, gorillas, tigers, leopards, snakes, lizards and birds. Tropical rainforests are found in the Western Ghats of India, Assam, Southeast Asia, Central America and Central Africa.

21. How are animals adapted to live in tropical forests?

Tropical forests have ideal conditions to support a variety of animals. Since their numbers are high, the competition for food and shelter is equally intense. Many of these animals live on trees. The red-eyed frogs have sticky pads on their feet to climb trees. Monkeys have long tails to grasp and hang from branches. Birds like Toucan have long large beaks to reach fruits on tiny branches that are too slender to bear their weight.

22. About what percent of the earth’s surface is covered by rainforests?

6%

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