Weather, Climate and Adaptations of Animals to Climate (Part - 2)

  Weather, Climate and Adaptations of Animals to Climate

Q.10. Explain climatic conditions of Polar Regions.

Ans. The Polar Regions present an extreme climate. These regions are covered with snow and it is very cold for most part of the year. For six months the sun does not set at the poles while for the other six months the sun does not rise. In winters, the temperature can be as low as –37°C.

Q.11. Tropical region generally has a hot climate. Why?

Ans. The tropical region has generally a hot climate because of its location around the equator. Even in the coldest month the temperature is generally higher than about 15°C. During hot summers, the temperature may cross 40°C. Days and nights are almost equal in length throughout the year. These regions get plenty of rainfall.

Q.12. Tropical region generally has a large population of animals. Why?

Ans. An important feature of this region is the tropical rainforests. because of the continuous warmth and rain, this region supports a wide variety of plants and animals. The climatic conditions of rain forest are highly supportive and suitable for providing a healthy habitat in the enormous number and variety of animals.

Q.13. Write the differences between Polar Regions and tropical rainforests.

Ans. 

TROPICAL RAINFORESTS	POLAR REGIONS
Climate is hot and humid	Climate is cold.
Has heavy rainfall	Are permanently covered with snow.
Wide variety of vegetation	Less vegetation

Q.14. Name some countries where Polar Regions are found.

Ans. the Polar Regions are situated near the poles, i.e., north pole and south pole. Some well-known countries that belong to the Polar Regions are Canada, Greenland, Iceland, Norway, Sweden, Finland, Alaska in U.S.A. and Siberian region of Russia.

Q.15. Name some countries where tropical rainforests are found.

Ans. Examples of some countries where the tropical rainforests are found are India, Malaysia, Indonesia, Brazil, Republic of Congo, Kenya, Uganda, and Nigeria.

Q.16. What is meant by migration? Why do birds migrate?

Ans. Migration is another means to escape the harsh, cold conditions.

The seasonal movement of the complete population of animals from one area to another is termed as migration. It is usually a response to the changes in temperature, food supply, or the amount of daylight and is usually undertaken for the purpose of breeding.

when winter sets in, there is not enough food to sustain the many bird populations that depend on a constant supply of a variety of foods.  This lets birds know it is time to move on, or migrate, to another area that can meet their needs. Such birds are called migratory birds.

Q.17. How do birds know to migrate? How long does bird migration take? Mention other organism also that migrates.

Ans. They migrate to warmer regions when winter sets in. They come back after the winter is over.  Some migratory birds travel as much as 15000 km to escape the extreme climatic conditions at home.

Generally they fly high where the wind flow is helpful and the cold conditions allow them to disperse the heat generated by their flight muscles. But how these birds travel to the same place year after year is still a mystery. It seems that these birds have a built–in sense of direction and know in which direction to travel. Some birds probably use landmarks to guide them. Many birds may be guided by the sun during the day and stars at night. There is some evidence that birds may use the magnetic field of the earth to find direction.

 And it is not only birds that migrate; mammals, many types of fish and insects are also known to migrate seasonally in search of more hospitable climates.

Q.18. Siberian crane comes from Siberia to usually which places of India?

Ans. Siberian crane that comes from Siberia to places like Bharatpur in Rajasthan and Sultanpur in Haryana, and some wetlands of north east and some other parts of India.

Q.19. Which option best describes a tropical region?

a) cold and humid

b) Hot and Humid

c) Hot and dry

d) Moderate temperature

Ans. b) Hot and Humid