Earth
Rocks
Rock Layers
Grand Canyon
Rocks continued
100
The Earth.
What is 4.5 billion years old?
100
A rock that has compacted and cemented together.
What is a sedimentary rock?
100
A layer of imestone.
What is the result of an acient ocean?
100
The Grand Canyon.
What is 10 million years old?
100
It contains white calicium carbonate.
Why is limestone white?
200
The inner core.
What is the hottest layer of the earth?
200
A numeric time scale.
What is a time scale that shows how many years ago events happened?
200
Different layers of rock together.
What is a formation?
200
A Limestone layer in the Grand Canyon.
What provides evidence that the area was once covered by an ocean?
200
Physical and chemical processes.
What breaks up rocks?
300
The trilobite.
What is the first sign of life.
300
Large crystals in an igneous rock.
What is the result of a slower cooling rate?
300
A fossil that has lived for a very short period of time in many places around the world.
What is an index fossil?
300
To compare the rock's ages.
What is an index fossil used for?
300
When a rock forms from cooling magma.
What makes an igneous rock?
400
It forms underground slowly.
What makes Granite have large crystals?
400
The way they form.
What is the major difference of all three types of rock?
400
The rock layer is older.
What does it mean when a rock layer is deeper down than the other?
400
It reveals new fossils, and geological events that happened as well as, providing clues on what the environment was like when the layer formed.
Why is the Grand Canyon important to geologists?
400
The mantle.
What iis the huge layer that lies between Earth's crust and core?
500
Erosion.
What is one of Earth's deconstructive processes?
500
They contain calcium carbonate.
What does it mean when a rock fizzes when you pour acid on it?
500
To compare the age of rock layers.
What is the use of an index fossil?
500
The lower or deeper rock layers.
Which rock layers are probably older?
500
Deposition.
What is it called when water and wind slows down bits of rock settle?
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