Show:
Earths Interior
Earths Layers
The Theory Of Plate Tectonics
Boundaries
Unit Review Vocab Terms
100
How did Earth form?
About 4.6 billion years ago, a cloud of gas and dust that we call the solar nebula began to pull together and rotate.
100
What is Earths thin, outer shell called?
Crust.
100
What is continental drift?
The hypothesis that today's continents were once part of a single landmass.
100
What three types of stress can cause deformation?
Compression, Tension, and Shear Stress.
100
What is the change in magnetic poles?
Magnetic reversal.
200
What do scientists believe raised Earths temperature during its formation?
Scientists believe that energy was generated by the collisions that formed the planet and by the breakdown of unstable elements.
200
What is the compositional layer below the crust?
Mantle.
200
What evidence supports continental drift?
The shapes of continents, rocks and fossils, and climatic evidence.
200
What is the definition of deformation?
Bending, tilting and breaking of rock.
200
What is the process by which a new sea floor forms?
Sea Floor Spreading
300
What do P waves travel through?
Solids, Liquids and Gases.
300
What is at the center of the Earth and contains very dense materials?
Core.
300
What is plate tectonics?
States that Earth's surface is made up of giant, moving slabs called tectonic plates.
300
How does a convergent boundary form?
When tectonic plates move toward each other and collide.
300
What is the process of one plate sinking below another?
Subduction.
400
What do S waves travel through?
Solids.
400
Which layer is liquid due to very high temperatures?
Outer Core.
400
What evidence supports plate tectonics?
Plate tectonics explains that the continents are not actually "drifting". Instead they are parts of giant moving plates.
400
How does a divergent boundary form?
When two tectonic plates move away from one another.
400
What is a chain of volcanic mountains called?
Volcanic Arc
500
What is the vocabulary term for when earthquakes release waves of energy that travel through rock?
Seismic Waves
500
Which layer is under more pressure and is solid?
Inner core
500
What is the definition of theory?
A system of ideas that explains many related observations about the natural world.
500
How do transform boundaries form?
When two tectonic plates can move past one other in opposite directions.
500
What does stress cause rock to do?
Bend, tilt or break.