Q I Identify the terms explained below:
1. All types of plant life that grow under natural conditions are known as –
natural vegetation.
2. Large geographical expanse is known as – biome.
Q II Identify the animals given below. Name the continent they are found in. Give
reasons what makes the wildlife of this continent unique
Animals: Koala, Kangaroo, Kookaburra, Emu.
Continent: Australia.
Reasons for unique wildlife: Both geologic and climatic events helped to
make Australia's fauna unique. Australia was once part of the southern
supercontinent Gondwana . The establishment and evolution of the presentday
fauna was apparently shaped by the unique climate and the geology of
the continent. As Australia drifted, it was, to some extent, isolated from the
effects of global climate change. The unique fauna that originated in
Gondwana, such as the marsupials, survived and adapted in Australia. This
continental boundary prevented the formation of land bridges and resulted in
a distinct zoological distribution
Q IV The picture given below depicts the original forest cover on the earth and the
recordings of the cover in 2005. Observe the picture and answer the following
questions
1. In comparison to the original forest cover, the forest cover in 2005 has
decreased. (increased/decreased)
2. Give any two reasons for degradation of natural vegetation. – deforestation,
natural disasters, overgrazing, forest fires.
3. What is the result of this degradation?
It has led to barren hill slopes, increased surface runoff, soil erosion, reduced
underground water table, decrease in rainfall, destruction of habitat of wild
animals and extinction of many species.
1. All types of plant life that grow under natural conditions are known as –
natural vegetation.
2. Large geographical expanse is known as – biome.
Q II Identify the animals given below. Name the continent they are found in. Give
reasons what makes the wildlife of this continent unique
Animals: Koala, Kangaroo, Kookaburra, Emu.
Continent: Australia.
Reasons for unique wildlife: Both geologic and climatic events helped to
make Australia's fauna unique. Australia was once part of the southern
supercontinent Gondwana . The establishment and evolution of the presentday
fauna was apparently shaped by the unique climate and the geology of
the continent. As Australia drifted, it was, to some extent, isolated from the
effects of global climate change. The unique fauna that originated in
Gondwana, such as the marsupials, survived and adapted in Australia. This
continental boundary prevented the formation of land bridges and resulted in
a distinct zoological distribution
Q IV The picture given below depicts the original forest cover on the earth and the
recordings of the cover in 2005. Observe the picture and answer the following
questions
1. In comparison to the original forest cover, the forest cover in 2005 has
decreased. (increased/decreased)
2. Give any two reasons for degradation of natural vegetation. – deforestation,
natural disasters, overgrazing, forest fires.
3. What is the result of this degradation?
It has led to barren hill slopes, increased surface runoff, soil erosion, reduced
underground water table, decrease in rainfall, destruction of habitat of wild
animals and extinction of many species.
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