Classifying Rocks - Earth Structures

About 20 minerals make up most of the rocks of Earth’s crust, this minerals are know as:

• The 20 minerals of power

• Earth builders

• Rock forming minerals

• Expanded minerals

Rocks ______ provides clues to the rocks mineral composition

• Color

• Size

• Style

• Weight

Most rocks are made up of particles of minerals and other rocks, which geologists call:

• growth

• mixture

• Waves

• Grain

The size, shape, look and feel of the grain help geologist determine the _______ of a rock.

• Color

• Weight

• Texture

• Happiness

What are the three major groups of rocks?

• Grainy, textured, and large

• Igneous, sedimentary and metamorphic rocks

• Mineral based, rock based, and earth based

• Small, medium and large

This rock forms from the cooling of magma, the magma hardens underground as well as erupts and cools on the earth surface to form this rock

• sedimentary rocks

• metamorphic rocks

• Igneous rocks

• Magma rocks

This rock is formed when small partials of rocks or remains of plants and animals are pressed and cemented together.

• Layered rocks

• Igneous rocks

• metamorphic rocks

• sedimentary rocks

This rock is most often formed underground when heat or pressure or by chemical reactions that change the rock.

• Mutant rocks

• Sedimentary rocks

• metamorphic rocks

• Igneous rocks

Pumice is a type of rock that forms from molten material that erupts violently from a volcano. Which group would you classify this rock?

• metamorphic rocks

• Igneous rocks

• sedimentary rocks

• Magma rocks