What do you call the people who study rocks?

Which of the following is a hard rock?

This is the hardest rock known on Earth.

Which of the following is a soft rock?

What is the soft rock used to make the lead in the pencils?

Which of the following rocks is used to make a blackboard?

The rocks are made up of these materials.

What is the softest mineral known on Earth?

Which of the following is NOT an example of gemstone?

________ is a mineral present in milk and dairy products that can make our bones and teeth stronger.

_________ is used to make talcum powder.

To light a fire, we can use ________.

True or False:

Rocks are minerals.

True or False:

Rock salt is a rock used to add taste in our foods.