Igneous
Sedimentary
Metamorphic
Fossils
Earth Processes
100
When molten lava cools and hardens.
How does a igneous rock form?
100
When sediments are glued together over time.
How does a sedimentary rock form?
100
When a rock is put under heat and pressure for a long period of time.
How is a metamorphic rock created?
100
A Fossil is the remains of a plant or animal preserved in rock
What is a Fossil?
100
4.5 Billion years ago
When did earth form?
200
A shiny,black rock with no crystals.
What is obsidian?
200
When sediments form with calcium carbonate
What is limestone?
200
All rocks can become metamorpic
What type of rocks can become metamorpic?
200
Sedimentary rock.
What rock would most likely contain fossils?
200
A destructive force destroys earth formations using forces like erosion
What is a destructive force?
300
Yes the cryistals would be big.
Would the crystal size be big if cooled slowley?
300
Sediments are rock eroded by the forces of erosion.
What are sediments?
300
Metamorpic rocks are found in the top layers of earth.
Where are most metamorpic rocks found?
300
A fossil that has lived a short period of time around the world.
What is a index fossil?
300
A constructive force builds rock formations through processes like sedimentation.
What is a constructive force?
400
They form deep underground.
Where do igneous rocks form?
400
It is the glue that holed sedementary rocks together.
What is a matrix?
400
Deep underground.
Where do metamorpic rocks usually form?
400
Limestone.
What type of rock contains fossils?
400
It formed 10 million years ago.
When did the grand canyon form?
500
Yes, igneous rocks can be remelted and reformed.
Can igneous rocks be reformed?
500
It is a dissolved marine animal shell that serves as a matrix
What is calcite?
500
Granite=Gneiss
What is granite when changed due to heat and pressure?
500
They tell what age a rock layer is.
Why are index fossils important to geologists?
500
The tectonic plates.
What constructive and destructive force within the earth moves only inches a year?
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