Term for molten rock once it has exited the central vent of the volcano.
What is lava?
100
The vibration produced by rapid slippage near earth's crust.
What is an earthquake?
100
A barrier across a river that holds back its water during times of heavy rainfall.
What is a dam?
100
New land formed at the mouth of a river.
What is a delta?
100
The breaking down of rock on Earth's surface into smaller pieces.
What is weathering?
200
Geologic feature that is cone-shaped with an opening in earth's crust where lava, ash, cinders, and gas escapes.
What is a volcano?
200
A scientist who studies earthquakes.
What is a seismologist?
200
Built to keep rising waters in the channel from spreading laterally over surrounding land.
What is a levee?
200
Hill of sand, made and shaped by the wind.
What is a sand dune?
200
Process by which weathered rocks and particles are picked up and carried to other places.
What is erosion?
300
This forms where plates push against each other or pulls away from each other.
What is magma?
300
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The point in the lithosphere where earthquakes start.
What is the focus?
300
One of two problems caused by the erosion and deposition of sand at the beach.
What is sand moves away from one part of the beach and builds up the other or moving sand fills in the channels making them too shallow for boats to pas through.
300
One of earth's layers that contain soft areas on which plates float?
What is the mantle?
300
Huge sheets of ice that slowly move over land.
What are glaciers?
400
Blocks of crust and upper mantle rock that fit together like puzzle pieces.
What are plates?
400
The point directly above the focus on Earth's surface.
What is the epicenter?
400
A wall-like structure that sticks out into the ocean.
What is a jetty?
400
A break in the earth's crust.
What is a fault?
400
A large hole formed when the roof of a cave collapses.
What is a sinkhole?
500
The three main kinds of volcanos.
What are shield, cinder cone, and composite?
500
Used by seismologists to help track the movement of faults and plates that cause earthquakes.
What is a GPS?
500
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One way people restore beaches.
What is sand is dredged from a channel and deposited on a nearby beach or artificial reefs.
500
How a chain of volcanoes are formed.
What is movement over a hot spot?
500
All of the following are forces that change landforms except a: wind; b: moving water; c: glaciers; d: physical features.