# 7th Grade Science : Earth and Space Science

## Example Questions

### Example Question #1 : Earth And Space Science

Select the theory that states that the Earth's outer shell is divided into several plates that glide over the mantle.

Layered Theorem

Mantle Theorem

Plate Techtonics

Outer Techtonics

Plate Techtonics

Explanation:

Plate Techtonics states that the Earth's outer shell is divided into several plates that glide over the mantle.

### Example Question #2 : Earth And Space Science

Select the outer most layer of the Earth.

Mantle

Outer Core

Crust

Inner Core

Crust

Explanation:

The outer most layer of Earth is the Crust. The diagram provided illustrates the Earth's layers.

### Example Question #3 : Earth And Space Science

What type of rock could be made out of sand and shells?

Igneous

Metamorphic

Sedimentary

Igneous and Sedimentary

Sedimentary

Explanation:

Both sand and shells are small materials. A sedimentary rock is formed from small materials, such as sand and shells; thus, sedimentary is the correct answer.

### Example Question #4 : Earth And Space Science

Select the main difference between the three types of rocks: sedimentary, metamorphic, and igneous.

How the rocks are formed

The age of the rocks

The texture of the rocks

Where the rocks can be found

How the rocks are formed

Explanation:

The main difference between the types of rocks is how the rocks are formed.

Sedimentary rocks are formed from small particles of materials, such as sand or pebbles.

Metamorphic rocks are formed from changes in heat and pressure under the earth's surface.

Igneous rocks are formed from magna cooling and hardening.