Geography Class 8

Initially earth was a __________ hot balloon.

• Blue

• Lighter

• Heavier

• Gaseous

The interior of the earth is ________.

• Liquid

• Semi-Liquid

• Solid

• Semi-Solid

The direct observation of the earth’s interior is possible

• True

• False

Matter coming out of volcanic eruptions consists of a hot _____

• Air

• Gama

• Magma

• Sigma

When lava cools and solidifies, _____________ rocks are formed

• Igneous

• Sedimentary

• Metamorphic

• None of the above

Earthquake is the result of generation of _____________ waves

• Electromagnetic

• Seismic

• Radio

• Radioactive

Oceanic crust is made up of ___________

• Silica

• Magnesium

• Both of the above

• None of the above

________begins at a depth of around 42 km from the earth’s surface

• Crust

• Inner Core

• Outer Core

• Mantle

Inner core layer is also called Sial

• True

• False

________ proposed a day to honour the Earth

• NASA

• NCERT

• UNSECO

• FSSAI