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Vocabulary
Earth's layers
Continental drift
Quakes and eruptions
Earth's features
100
The lower part of "this" is under such pressure that it is solid.
What is Earth's core?
100
An area of raised flat land
What is a plateau?
100
the scientist that introduced the theory of continental drift
Who is Alfred Wegener?
100
The underground point where an earthquake occurs
What is the focus?
100
Plains, mountains, and valleys are _____________ that are caused by plate movement
What are landforms?
200
the place where two plates meet is called __________.
What is a plate boundary?
200
Where are trenches and ridges found?
What is under the ocean?
200
New crust forms at ocean ridges because of _______
What is seafloor spreading?
200
The area where earthquake damage may be the greatest.
What is the epicenter?
200
Most major earthquakes in the US occur in California and Alaska because __________________.
What is - they are located on a plate boundary?
300
Most of Earth's mass is in the _________
What is the mantle?
300
the 2 parts that make up the lithosphere
What is the Earth's crust and the mantle?
300
Seafloor spreading is caused by ________
What are convection currents?
300
Most volcanoes take place here
Where is on the ocean floor?
300
Most volcanoes are located __________.
What is on the ocean floor?
400
A break in Earth's crust is called ____________
What is a fault?
400
The lithosphere contains 20 pieces called ______
What are tectonic plates?
400
The name Alfred Wegener gave to the one large continent that was formed about 225 million years ago
What is Pangaea
400
Plates sliding past each other
What is a fracture boundary?
400
An instrument that records tremors (ground movement) and can predict earthquakes.
What is a seismograph?
500
the theory that explains how the lithosphere is broken into moving plates.
What is plate tectonics?
500
Earth's outer core is a __________
What is a very dense liquid?
500
If a fossil was found along the eastern coast of South America, a similar fossil would need to be found here to prove the theory of continental drift.
Where is the western coast of Africa?
500
The strength of an earthquake is measured
What is magnitude?
500
These occur when pressure that builds up along a fault is released.
What is an earthquake?