ROCKS AND MINERALS

igneous rock

 Forms from magma or lava. Most abundant on Earth’s surface.
 

Sedimentary rock

Forms when particles from other rocks or the remains of plants and animals are pressed and “cemented” together. Results from the evaporation of sea water

Metamorphic rock

Forms from existing rock that is changed by heat, pressure, or chemical reactions deep beneath the surface of Earth.
 

Intrusive rock

Formed when magma hardens beneath the Earth’s surface. Found of the ocean floor. (course grain)-cools slowly

Extrusive rock

Igneous rock formed from lava on Earth’s surface.  Forms core of mountain ranges. (fine grain)-cools rapidly

Properties of minerals

Natural occurring, definite chemical composition and volume, inorganic, crystal structure

The evaporation of seawater results in which type of rock?

Sedimentary

Fossils are found in which type of rock?

Sedimentary

Rock most common on earths surface

igneous

The most abundant elements in the earth crust

Oxygen and Silicone

Type of rock that forms the ocean floor

Intrusive rock

What would happen if weathering and erosion stopped?

The rock cycle stops

igneous rock (ex)

Granite, obsidian, basalt, pumice

Sedimentary rock (ex)

Coal, shale, sandstone, limestone

Metamorphic rock (ex)

Gneiss, marble slate

What type of rock is found on earths surface and in the interior?

igneous rock

3 types of rock and how are they formed?

igneous, metamorphic and sedimentary

what is weathering

The chemical and physical processes that break down rock at the surface.

Explain phsyical or chemical weathering?

Chemical - Natural acid or lichens breakdown rock.

 Physical weathering- Can be caused by water, wind, or variations in temperature such as seasonal freeze-thaw cycles.

What would happen if weathering and erosion stopped?

The rock cycle stops