Metamorphic rocks are formed deep in earth's crust by

When lava or magma cool down and harden it forms

When weathering happens to rocks they break down and eventually form

2 or more minerals make a rock. There are about _________ different minerals found on earth.

These rocks are very hard, often shiny, and can have bands of color.

Soil is different than sand because soil has organic matter in it. What is organic matter?

These rocks are formed when little bits of rock get squished together and harden into layers.

The solid layer of rock in earth's crust is called

Sandstone, Limestone, Shale, and gypsum are examples of

These rocks often have fossils, layers, and are not as hard as other types.

The scientific study of earth is known as

Igneous rocks are formed by

Obsidian, pumice, and granite are all examples of

Marble, slate, schist, gneiss (nice), coal, and quartzite are examples of

When a rock is changed into a different type it is called a

Rocks are sorted by