Formation of the Earth
Layers of the Earth
Plate Tectonics
Plate Boundaries
Plate Boundaries
100
The force that is the cause of Earth's formation
What is gravity
100
The number of layers of Earth
What is 4
100
The crust and the top rigid part of the mantle
What is the lithosphere
100
This is where plates meet
What are plate boundaries
100
The reason plates move
What are convection currents in the mantle
200
What happened to the densest materials during Earth's formation
What is moved toward the center
200
This is the thinnest layer
What is the crust
200
The lithosphere is made up of _________
What are plates
200
Plates that move past each other in opposite directions
What are transform boudnaries
200
Where earthquakes may occur
What is at transform boundaries
300
What happened to the less dense materials during the Earth's formation
What is formed the outer layers
300
This is layer has a rigid upper layer and a liquid lower layer
What is the mantle
300
These cause the plates to move at different speeds and in different directions
What are convection currents
300
When plates move away from each other
What are divergent boundaries
300
Where rift valleys or trenches may occur
What is at convergent boundaries
400
Scientists believe the universe formed about 14 billion years ago in an event known as the ____________
What is the Big Bang Theory
400
The only completely liquid layer on Earth
What is the outer core
400
Convection currents happen here
What is in the mantle
400
Where plates move toward each other
What are convergent boundaries
400
Where mountain ranges are formed
What is at convergent boundaries
500
The reason Earth has seasons
What is its tilt on its axis and its revolution around the sun
500
A solid layer made of iron and nickel
What is the inner core
500
Most of the boundaries between plates are here
What is under the ocean
500
When one, more dense plate, slips under another plate
What is subduction
500
The name of the giant land mass given to the continents before they began to drift
What is Pangea
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