Inside our Earth

Which is the outermost layer?

• Inner core

• Crust

• Lithosphere

• Outer core

What does the oceanic crust mainly consist of?

• Silica

• Alumina

• Sima

• Sial

What is the depth of the mantle?

• 2500 km

• 2900 km

• 2800 km

• 2700km

Which are the three major types of rocks?

Which rocks are also known as primary rocks?

• Metamorphic

• Sedimentary

• Igneous

• Intrusive

How are sedimentary rocks formed?

How are rocks useful?

What is a rock cycle?