True or False
Earthquakes happen ONLY along plate boundaries.
False.
All metamorphic rocks have foliations.
False
Wood
No. It comes from a living thing.
How is a fossil formed?
Part of a plant/animal becomes cemented and compacted in sediment and is trapped/preserved within sedimentary rocks.
A pebble got compacted and cemented with broken up seashells and other sediments.
Sedimentary
A rock is not a mineral, but it does contain minerals.
True
Igneous rocks with large crystals cooled very quickly.
False
Plastic
No, it is man-made
What are 3 physical properties that geologists look at when identifying minerals?
Luster
Hardness
Streak
Color
Cleavage/Fracture
Crystal Structure
Lava erupted from a volcano and hardened.
Igneous
Sedimentary rocks can be formed by chemical processes.
True
When metamorphic rocks are formed, they sometimes change to a liquid state.
False. They must remain solid, otherwise they are igneous.
Salt
Yes.
Naturally Occurring
Not Living
Solid
Certain Elements
Atoms Align Precisely
How do geologists check the hardness of a mineral
They use the scratch test. A cooper nail can only scratch soft minerals. A steel nail can scratch soft and medium minerals.
After the lava hardened, it weathered away into sediment and became compressed.
Sedimentary
Luster is a physical characteristic used to identify rocks
False. It is used to identify minerals.
Weathering and erosion are the same thing.
False.
Bonus: how are they difference?
Gold
Yes.
Naturally Occurring
Not Living
Solid
Certain Elements
Atoms Align Precisely
How are sedimentary rocks formed?
Sediments are compacted and cemented together, and pressed together into rocks.
A rock deep semester Earth became superheated and compressed.
Metamorphic
Fossils can only form in sedimentary rocks
True
What is the basic process that forms Igneous Rocks? Metamorphic Rocks? Sedimentary Rocks?
Heat
Heat AND Pressure
Pressure
Sugar
No, it comes from a living thing
How are metamorphic rocks formed?
Metamorphic rocks are formed when rocks are put under so much heat and pressure that they transform into a completely new rock.
A rock experience immense heat and pressure, and then it becomes liquid and hardens.
Igneous