PESS Unit 5 study guide
Ways to identify minerals
Color Streak Luster Hardness Cleavage + Fracture Fluorscence Magnetism Smell Taste Radioactivity
What is a Igneous rock?
Form when hot, molten rock crystallizes and solidifies Texture depends on where magma cools and how long it takes
The two types of igneous rocks?
Intrusive extrusive
What is biological activity weathering?
Mechanical weathering in which roots wedge between/around rocks and eventually cause them to break
What is a metamorphic rock?
Metamorphic rocks were once igneous or sedimentary rocks that were exposed to intense heat and/or pressure within the Earth's crust They are crystalline and often have a "squashed " (foliated or banded) texture
What is a sedimentary rock?
Sediment becomes compacted and cemented, forming sedimentary rock.
Why it is important to prevent erosion?
Soil erosion deceases soil fertility, which can negatively affect crop yields
What is the 5 characteristics of a mineral?
Solid naturally occurring inorganic fixed chemical formula specific atom structure
Extrusive igneous rock
That is dark colored volcanic glass. it forms so quickly that no crystals of forms.
What is frost wedging?
The process by which water seeps into a rock's cracks, freezes, expands them, then melts, leaving larger cracks in the rocks. This continues until the rocks break.
Intrusive igneous rock
igneous rock that forms when magma rises up and cools in a place underground
What is the water table?
the level below which the ground is saturated with water.