Rocks Review

What is a mineral?

• A piece of salt.

• Any living or non living thing.

• A component of your teeth.

• Any non living solid that has a crystal form.

What do all crystals have in common?

• The particles in a crystal combine to form a shape that is repeated over and over again.

• The particles in a crystal combine to form shapes that can vary.

• They are all shiny.

• Each crystal is very different from another. Crystals do not have anything in common.

Each mineral is made up of _________ of nonliving things called elements.

• the same

• different

The Mohs Scale is used to compare how ___________ a mineral is.

Explain how the Mohs scale works.

Luster is the property of minerals which describes

• how hard a mineral is.

• how a mineral reflects light.

• how old a mineral is.

Luster never is

• metallic.

• glittery.

• earthy.

• glassy.

Minerals which break with sides that are smooth and straight have

• fracture.

• cleavage.

Minerals which do not break on a smooth line have

• fracture ,

• cleavage.

Describe what a mineral's streak is.