Ignorant Igneous
What is one of the hints for identifying an igneous rock?
Bubbles, Glassy appearance
How are Metamorphic rocks formed?
Heat and pressure
How does sedimentary rock form?
Name one way geologists use to identify a mineral?
What are the main types of rock?
igneous, metamorphic, sedimentary
From volcanoes
What is one hint for identifying a metamorphic rock?
Bended layers
Squished layers
WHat's the difference between sedimentary rock and sediments?
Sedimentary rocks form from the compaction and cementation of sediments.
Rocks are made of 2 or more minerals
What is the difference between lava and magma?
Magma - below surface
How does metamorphic rock from sedimentary rock?
Heat and pressure
What is a hint for identifying a sedimentary rock?
Flat layers, mixed particles
It's a test of how hard a mineral is based on the known hardnesses of various minerals
Define erosion
The process of water, ice, wind or gravity moving weathered particles of rock and soil to new locations
What are the two types of igneous rocks?
Extrusive and intrusive igneous rocks
How do you form igneous rock from Metamorphic rock? (2 steps)
Melting and then cooling & hardening of lava or magma
What unique thing is most likely to be found in sedimentary rock?
Fossils
What is the definition of a mineral?
A solid, naturally-occurring, inorganic substance with a crystalline structure
How does metamorphic rock form into sediment?
Weathering and erosion
What's the difference between extrusive and intrusive igneous rock
Intrusive igneous - magma cools beneath the earth's surface
Extrusive igneous - lava cools above the earth's surface
How does metamorphic rock differ from igneous rock?
metamorphic - bended layers, squished layers, heat and pressure form it
Igneous rock - glassy appearance, bubbles, formed from volcanoes
Weathering and erosion
Explain how a streak test helps identify a mineral
color of streak
It causes them to break down into sediment.