The Rock Cycle
Fossils
Earth Processes
Types of rocks
Timelines
100
It's a series of things that change a rock
What is the rock cycle
100
They are fossils that have lived in many different places around the world for a short time
What are index fossils?
100
removal and transportation of loose earth material
What is erosion?
100
heat and pressure
How do metamorphic rocks form?
100
How ages of things compare to the whole
What do proportional time scales show?
200
All three rocks!
What rocks can be changed by heat or pressure?
200
Their ages give clues to the ages of the layers
Why are index fossils useful to geologists?
200
settling of eroded earth material
What is deposition?
200
When magma cools and hardens
How do igneous rocks form?
200
The precise ages of things
What do numeric time scales show?
300
That it cooled slowly
When a rock has large crystals, what does it mean?
300
When a river or wind blows them or transports them down a stream
How do sediments tend to settle?
300
particles of earth material that might create sedimentary rocks.
What are sediments?
300
When sediments are matrix together
How do sedimentary rocks form?
300
Cenozoic era
What time are we in now?
400
Formed under the Earth's surface.
When a rock is intrusive, what does it mean?
400
Plants, animals, organisms.
What can be a fossil?
400
a curve or loop of a river
What is a meander?
400
it means "changed"
What does metamorphic mean?
400
Geologic time moves backwards, and historical timelines don't.
What is the difference between geologic and historical timelines?
500
That they're made of minerals!
What do most rocks have in common?
500
Index fossils lived for a short time in many different places and normal fossils might not have.
What is the difference between index and normal fossils?
500
sandstone has a matrix and sand does not.
What is different about sand and sandstone
500
No, some rocks like sedimentary and igneous form on the surface.
All rocks form underground?
500
It moves backwards.
Does geologic time move backwards or forward?
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