Rocks and Minerals

Rocks are made of ______________.

• Minerals

• Vitamins

• Plants

When tiny pieces of rocks pile up, stick to each other, and harden, ____________________ rocks are formed.

• Metamorphic

• Igneous

• Sedimentary

When heat and pressure are applied to sedimentary and igneous rocks, (a)   rocks are formed.

Explain how igneous rocks are formed in your own words.

Scientists describe rocks by 4 properties. Choose all the properties.

• Hardness

• Thickness

• Color

• Size

Why do igneous rocks have dark color?

In Jeju island, you can see many (a)   rocks.

What kind of rock do we call when it changes from one kind of rock to another like a caterpillar becoming a butterfly?

The rock in the picture is a sedimentary rock. Why do you think this rock is a sedimentary rock? (*Look at the picture carefully.)

Scientists describe that a diamond is very hard to break. Which number shows the hardness of the diamond?

• 1

• 0.3

• 5

• 10