Rocks 20

What are all rocks made of?

• minerals

• sand

• soil

• boulders

What material is made from tiny pieces of rock?

• sand

• boulder

• mineral

• marble

What is erosion?

• breaking up of rock

• freezing of rock

• carrying away of rock

• building up of rock

How does weathering change rocks?

• It breaks them up.

• it makes them harder.

• It moves them.

• It makes them larger.

When water gets into the cracks of a rock how is it changing?

• It is getting larger.

• It is getting smoother.

• It is breaking into pieces.

• It is getting smaller cracks.

Rocks can have different colors.

• true

• false

Rocks can be round, square, or triangular in shape.

• true

• false