What layer of the earth consists of gases, and is where weather occurs?
atmosphere
100
Alfred Wegener is responsible for the theory of...
Continental Drift
100
Earthquakes occur at what type of boundaries?
transform boundaries
100
What is a tsunami?
a tidal wave caused by an earthquake
200
What layer inside the earth is made of molten rock?
mantle
200
What does the theory of Continental Drift state?
continents move in plates
200
What geological feature might you find at a convergent boundary?
mountains, volcanoes
200
How did scientists learn about the layers of the earth?
Using earthquake readings
300
In what layer of the earth do convection cells occur?
mantle
300
What do scientists believe causes plates to move?
convection cells
300
A mid-ocean ridge is often located at what type of boundary?
divergent
300
Movement of earth's plates causes
a) hurricanes
b) tornadoes
c) earthquakes
d) typhoons
c) earthquakes
400
What best describes the layer of the earth with water and oceans? (I'm not looking for "crust")
hydrosphere
400
Give two pieces of evidence that support the theory of Continental Drift
1) similar fossils in South America and Africa
2) puzzle-shape fit of the continents
3) identical rock formations in South America and Africa
4) coal in Antarctica
400
Why are there more earthquakes and volcanoes on the west coast of the US than on the east coast?
it is where two plates meet
400
Explain how convection cells work
Hot magma rises from the mantle to the crust, where it cools and sinks back into the mantle
500
What layer of the earth is the hottest?
the inner core (just "core" is OK)
500
The east coast of South America and west coast of Africa seem to fit together. What do scientists believe this indicates?
They were together as part of a continent called Pangaea
500
What occurs at a mid-ocean ridge?
two plates separate, and new magma from the mantle fills in the empty space
500
Which layer of the earth is the hottest and made of nickel and iron?