4th Grade Social Science Unit 4

Rocks formed when liquid magma cools and solidifies.

Rocks formed when different materials are deposited in the same place. These rocks are usually found in layers.

The outer layer of the Earth. It's made of rocks.

Rocks that have changed over time because of extreme pressure or heat.

The minerals in the rock.

The ____ of some minerals is easy to see. With other minerals, a dirty surface can hide the _______.

Where the rock is found and what it looks like.

The colour of a mineral when it is a powder.

The inner layer of the Earth. It is made up of metals.

The grains of most minerals have an irregular _____. Some are arranged in sheets, others are perfectly geometrical.

Weight of a mineral

The middle of layer of the Earth. It is made of rocks.

Minerals that have a perfect geometrical shape are called _______.

The shape of the grains in a rock.

The way the surface of a mineral looks in reflected light.

How easy it is to scratch the surface of a mineral.