REVISION (VII)

The most important component of the biological environment is ----

• –A ) Plant

• –B ) Man

• –C ) Water

• –D ) Land

Q3 The sphere of the environment which provides us land is called-

• –A ) Hydrosphere

• –B ) Atmosphere

• –C ) Lithosphere

• –D ) Biosphere

Volcanoes erupt due to --

• –A ) internal disturbance of the earth

• –B ) external disturbance of the earth

• –C ) climate change

• –D ) man-made changes on the earth

Q5 Identify the term that stands for the topmost layer of the earth comprising of loose material-

• –A ) minerals

• –B ) soil

• –C ) sial

• –D )sima

The rock which is rich in silica and magnesium is called --

• –A ) SIMA

• B)SIAL

• –C) IGNEOUS ROCK

• –D)NONE OF THESE

How much % of area of the southern Hemisphere is covered with water ?

• 43%

• 57%

• 46%

• 35%

Which of the following can be an erosional landform?

• river valleys

• arches

• beaches

Which of the following can be depositional landforms?

• river valleys

• arches

• beaches

What are the types of gradation

• Aggradation

• Degradation

• Both A and B

• None

Breaking down of rocks into smaller pieces is known as ?

• Weathering

• Atmosphere

• Ecology

• Altering