Answer key PART -2
Q.11 Define
Thunderstorm- A storm with thunder, l ightning, and very heavy rain.
Shedding - Falling of old leaves allowing new ones to grow.
Torrid – The zone that receives the direct rays of the sun.
Q.12 When the earth moves around the sun on its orbit once in 365 ¼
days it is called revolution.
The most important effect of revolution is that it causes seasons.
There are four main seasons summer winter spring autumn.
Q.13. Winds also have an effect on the climate of a place.
Depending on the place of origin of the wind it may either be hot or cold.
Winds blowing in from the sea carry moisture & are cool.
While winds blowing in from the desert are hot.
Q.14. Places on the east get to see the sun first and their time is ahead of
places in the west.
Thus Japan, which lies in the extreme east of the eastern hemisphere is
called the Land of rising sun.
Q.15.Latitudes Are parallel to each other.
They run from east to west on the globe
They are 181 in number.
Longitudes --- are not parallel to each other and meet at the poles.
They run from north to south
They are 360 in number
Q.16.A network of crisscrossing lines are called grid.
The longitude at 180 degrees is called the International Date Line. It is an
important line as the date changes after this line, when we cross to the east
of the line.
Q.17.A type of cultivation in which a piece of land is cleared by burning for
cultivation.
Crops are grown for 2 to 3 years
After which the land is abandoned because its productivity decreases.
Q.18.The earth has been divided into 3 temperature or heat zones.
The torrid zone
The temperature zone
The frigid zone
Q.19 Equinox is a term used for the 2 occasions in a year when a sun
shines vertically over the equator and day and night are of equal length
throughout the world.
The 2 equinoxes are
Spring or vernal equinox 21st march
Autumnal equinox 23rd
September
Q.20.It is hot because it receives the direct rays of the sun almost
throughout the year.
It is wet because moisture evaporates from the rivers ponds plants and
from clouds.
The clouds rise slowly and cause rainfall.
Q.21.The frigid zone is the coldest zone.
In some places there is permanent ice cover on the ground.
Nothing grows here.
Q.22. Major latitudes
Tropic of cancer 23 ½
Arctic 66 ½
Tropic of Capricorn 23 ½
Antarctic 66 ½
Equator 0 degrees
Long Answers
7x 5 marks
35
Q.24.The forest in the equatorial region receives rainfall throughout the
year so there is luxuriant growth of trees and their growing, fruit bearing
and shedding of leaves ,not shed their leaves at the same time.
Forest floor--- Trees found in the lowest layer
Shrub layer--- Formed by smaller trees or shrubs
Understorey--- Third layer comprises of ferns, creepers and vines
Canopy--- above them all
Q.25. Because cultivation is carried out extensively in a mechanized
fashion here. The machines called combinre harvesters are used to
harvest the crops
Crops such as wheat, barley, rye, flax and oat are grown.
Hot winds which blow in spring over the prairies are called Chinook.
. llamas, grizzly bears, swallow ,kangaroos etc are found here.
Q.26. A type of agriculture in which crops are grown on a large scale for
commercial purposes.
The Europeans introduced it.
In South East Asian countries and Africa
The crops grown in these plantations were tea, coffee, rubber, and cocoa.
Q.27.The weather is that of extremes .Infact the temperature in the hot
deserts sre among the highest in the world.It varies from 50° degree c- 10°
degree in summer.There is very little rainfall.
Varoius types of deserts are deserts found between 15° to 30° N and S of
the equator are hot desert.
There are temperature deserts such as Gobi desert
The cold deserts are found between the poles & the Arctic & Antarctic
circles
Q.28.Cow boys in South. America ride horses and take care of the cattle
and farms called ranches. They are called gauchos., and they round up
cattle on enormous farms known as estancias. These cowboys are skilled
horsemen.
Alfalfa
Q.29. Deserts are formed because the wind belt they fall under bring dry
winds from the inland ,
Instead of rain bearing winds from the sea.
They are also formed due to deforestation when infertile soli is left behind
when the top soil is blown away.
The main occoupation of the people of desert are mining, animal rearing,
trading and cultivation.
Oases Oasis are small patches of land in deserts which have water in the
form of lake or spring.
Q.30.Kalahari in Africa, Australian desert in Australia. Baobab, bottle tree
To store water
Q.31. Africa,
U.K,
Green island,
Australia,
India