Earth
Light
Fossils
Rocks
Force and Motion
100
The outermost layer of the Earth.
What is the crust?
100
The number of waves produced each second.
What is frequency?
100

The remains or traces of an organism that lived long ago is called 

What is a fossil?
100
A naturally occurring solid mixture of one or more minerals 
What is a rock?
100

A push or a pull.

What is a force?
200
The center of the Earth.
What is the Inner core?
200
A type of Electromagnetic radiation you can see.
What is visible light?
200
Hardened Tree sap.
What is amber?
200
A naturally formed solid matter that has crystalline structure.
What is a mineral?
200

The force exerted in response to an action force

What is a reaction force?
300
The layer of the Earth between the crust and the core.
What is the mantle?
300
The bending of light from one material to another.
What is refraction.
300
Most fossils are found in this type of rock.
What is sedimentary rock?
300
Rocks that form when hot, liquid rock (magma) cools.
What are igneous rocks?
300
The tendency for an object to remain in motion or at rest?
What is inertia?
400
Amber, Ice, Rock and, Tar
What are the four substances that help preserve organisms?
400
A disturbance that moves away from it's starting point.
What is a wave?
400

Fossils used to help determine the relative age of rock layers are called.

What are index fossils?
400

The series of natural processes by which rocks are slowly changed from one kind to another 

What is the rock cycle?
400
The rate at which velocity changes.
What is acceleration.
500
Nitrogen and Oxygen.
What are the two main gases in Earth's atmosphere?
500
The reason we see objects.
What is reflected light?
500

The age of an object compared to the age of another object.

What is relative age?
500
Changed by heat and pressure.
What are metamorphic rocks.
500
The amount of matter in an object?
What is mass?
M
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