Section 2: Forces of Change

Question 1

Mantle

Answer 1

A thick layer of hot dense rock.

Question 2

Continental Drift

Answer 2

The theory that the continents were once joined and then slowly drifted apart.

Question 3

Magma

Answer 3

Molten Rock

Question 4

Plate Tectonics

Answer 4

Is the theory that plate tectonics have been shaping Earth’s major landforms.

Question 5

Subduction

Answer 5

When a sea plate collides with a continental plate creating mountains.

Question 6

Accretion

Answer 6

Pieces of the Earth’s crust come together slowly as the sea plate slides under the continental plate.

Question 7

spreading

Answer 7

Sea plates pull apart.

Question 8

Fold

Answer 8

Moving plates squeeze the Earth’s surface until it bends.

Question 9

Fault

Answer 9

Plates grind or slide past each other, creating cracks in the Earth’s crust.

Question 10

Weathering

Answer 10

The process that breaks down rocks on the Earth’s surface into smaller pieces.

Question 11

Erosion

Answer 11

Is the wearing away of the Earth’s surface by wind, glaciers, and moving water.

Question 12

Loess

Answer 12

A fertile, yellow-gray soil deposited by wind.

Question 13

Glacier

Answer 13

Large bodies of ice that slowly move across the Earth’s surface.

Question 14

Moraine

Answer 14

When glaciers melt and recede, in some places they leave behind large piles of rocks and debris.