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
