This is the thinnest, outermost layer of the Earth.
What is the crust?
100
Geologists think all of the land on Earth was once connected into this supercontinent.
What is Pangaea?
100
This is the type of boundary where two plates move towards each other.
What is a convergent boundary?
100
This is the name of a circle of high volcanic activity in the Pacific Ocean.
What is the Ring of Fire?
100
This is the place deep underground where two plates slip past each other.
What is the focus?
200
This layer, found at the very center of the Earth, is made of solid metals.
What is the inner core?
200
This is the idea that the land masses gradually spread apart over time.
What is continental drift?
200
At this type of boundary, plates are moving apart.
What is a divergent boundary?
200
This is the name of a medium size volcano made of cinders that has a bowl shaped crater.
What is a cinder volcano?
200
Found at the surface, this is the middle of the earthquake, where its waves of energy spread from.
What is the epicenter?
300
This layer is made of all of Earth's solid and liquid water.
What is the hydrosphere?
300
This is a break or crack in the rock of the crust, along which movement occurs.
What is a fault?
300
At this boundary, plates are sliding past each other.
What is a transform boundary?
300
This type of volcano has a gentle, almost flat slope, that allows lava to flow long distances.
What is a shield volcano?
300
Earthquakes occur at these types of plate boundaries.
What are transform boundaries?
400
This is the largest of Earth's layers. It is what rises to the surface as magma and lava.
What is the mantle?
400
This geological feature occurs when two plates push against each other and both buckle upwards.
What are mountains?
400
This natural disaster occurs at transform boundaries.
What are earthquakes?
400
This type of volcano is formed from layers of lava and ash from past eruptions. It usually creates a large eruption and can have more than one opening.
What is a composite volcano?
400
When earthquakes occur in or near the ocean, these large and destructive waves are created.
What are tsunamis?
500
This layer is between the inner core and the mantle.
What is the outer core?
500
This is formed when one plate moves underneath another.
What is a volcano?
500
At a convergent boundary where both plates push up, this is formed.
What are mountains?
500
When a volcano erupts underwater, the lava often cools and forms this, like Hawaii.
What are islands?
500
This US state has more earthquakes than any other.