Kinds of Rocks
Molten rock that flows from volcanoes onto Earth's surface
What is lava?
This is the color of a mineral's powder.
What is streak?
Inorganic, solid materials found in nature.
What are minerals?
This is the ongoing process of change that transforms rocks.
What is a rock cycle?
Melted rock beneath Earth’s surface.
What is magma?
These form when melted rock from inside Earth cools.
What are igneous rocks?
The physical property of some minerals that causes them to break with uneven, rough, or jagged surfaces.
What is fracture?
A substance usually made up of two or more minerals.
What are rocks?
Metamorphic rocks that do not have parallel layers of mineral grains.
What are non-foliated rocks?
What is a person who studies rocks called?
What is a geologist?
New rocks that form when existing rocks are heated or squeezed.
What are metamorphic rocks?
The physical property of some minerals that cause them to break along smooth, flat surfaces
What is cleavage?
Solid materials made up of atoms arranged in a repeating pattern.
What are crystals?
Igneous rocks that form beneath the surface of Earth.
What are intrusive rocks?
These are the three types of rocks.
What are igneous, sedimentary, and metamorphic.
Metamorphic rock whose mineral grains are lined up in parallel layers
What are foliated rocks?
This describes how light is reflected from a mineral's surface.
What is luster?
A mineral that contains enough of a useful substance that it can be mined for a profit.
What is an ore?
Loose material, such as tiny pieces of rock, mineral grains, and bits of shell, that are weathered from rocks and carried by wind or water.
What is sediment?
This refers to the movement of weathered material by water, wind, ice, or gravity.
What is erosion?
Igneous rocks that form when lava cools on the surface of Earth
What are extrusive rocks?
This a system that ranks the relative hardness of minerals from 1 to 10.
What is Mohs Scale?
This compares the weight of a mineral with the weight of an equal volume of water.
What is specific gravity?
The remains or trace of a once-living plant or animal.
What is a fossil?
What is the most common mineral group in Earth’s crust?
What are silicates?