Lesson 2.1
What is Earth's outer layer made of?
Hard, solid rock
What natural disaster is evidence that Earth's plates move?
Earthquakes
What happens to the plates and mantle at convergent plate boundaries?
Plates move toward each other, and one plate is forced under the other one into the mantle.
At which type of plate boundary is rock from the mantle added to the plates?
Divergent plate boundaries
Which type of plate boundaries has both earthquakes and volcanic activity?
Convergent and Divergent plate boundaries
What layer is under the Earth's plates?
The mantle
What are the names of the two types of plate boundaries?
Convergent and Divergent plate boundaries
What happens to the plates and mantle at divergent plate boundaries?
Plates move apart from each other, and the mantle comes up then cools and hardens to form rock that adds to the plate.
At which type of plate boundary does one plate sink into the mantle and destroyed?
Convergent plate boundary
At which type of plate boundary would you find the Mid-Atlantic ridge?
Divergent plate boundary
What is the mantle made of?
Soft, solid rock
How do the plates move at convergent plate boundaries?
The plates move toward each other.
What landform is found at convergent plate boundaries?
A trench
What is the connection between plate motion and earthquakes?
Plate motion causes earthquakes.
At which type of plate boundary would you find the Mariana trench?
Convergent plate boundary
How is soft, solid material different than hard, solid material?
Unlike a hard, solid material, a soft, solid material can change shape and flow.
How do the plates move at divergent plate boundaries?
The plates move away from each other.
What landform is found at divergent plate boundaries?
A mid-ocean ridge
What other non-earthquake activity is associated with plate motion?
Volcanic activity
How long did it take for the South American and African plates to drift away from each other?
Millions of years
How do Earth's plates move?
Earth's plates move on top of a soft, solid layer of rock called the mantle.
What is Earth's outer layer made of under the ocean?
Hard, solid rock
What type of plate boundary is between South America and Africa?
Divergent plate boundary
India, a country that is part of Asia, was not always connected to the Asian continent. How did India come to be a part of Asia?
India and Asia are parts of different plates. The plates slowly moved toward each other as one plate went under the other plate into soft, solid rock over millions of years.
What are the names of the first two layers of the Earth?
Crust and Mantle