The ___________________ of the Earth is a huge solid metal ball that is extremely hot.

Rocks are made of one or more ___________________.

This mineral is rare, expensive and used for jewellery. This mineral is called __________________.

__________________ are remains of living things that died very long time ago.

A ___________________ is a person who studies about rocks.

Metamorphic rocks are rocks that are changed because of the ________________ and pressure over time.

The molten rock or liquid rock that reaches the Earth's surface is called _____________________.

________________ rocks are formed because the magma or lava cools down and harden.

________________ rocks are made up of pieces of rock called sediments that have been pressed together.

The example of igneous rock is __________________.

Fossils can be found in a sedimentary rock called _____________________.

This metamorphic rock is smooth when polished. It can have nice patterns and colours. This rock is called ___________________.