Ch 4 Sec 1

Question 1

Core

Answer 1

Decaying radioactive elements generate heat.

Question 2

Mantle

Answer 2

The zone that has most of Earth’s mass.

Question 3

Magma

Answer 3

Liquid rock within Earth.

Question 4

Plate tectonics

Answer 4

Forces within Earth create land forms.

Question 5

Continental drift

Answer 5

The plates slowly move across the upper mantle, usually less than an inch per year.

Question 6

Rift valleys

Answer 6

Places on Earth’s surface where the crust stretches until it breaks.

Question 7

Abyssal plains

Answer 7

The world’s flattest and smoothest regions.

Question 8

Continental shelves

Answer 8

The continental surface extends under the shallow ocean water around the continents.

Question 9

Trench

Answer 9

The deep valley making the plate collision.

Question 10

Folds

Answer 10

The squeezing of the continental plate causes volcanoes.

Question 11

Faults

Answer 11

Causes volcanoes.

Question 12

Weathering

Answer 12

Rocks break and decay over time.

Question 13

Sediment

Answer 13

Weathering breaks rock into smaller pieces of gravel, sand, and mud.

Question 14

Erosion

Answer 14

Changing landforms on Earth’s surface.

Question 15

Glaciers

Answer 15

Thick masses of ice.

Question 16

Plateau

Answer 16

Elevated flatland that rises sharply above nearby land on at least one side.

Question 17

Alluvial fan

Answer 17

Fan shaped deposit of mud and gravel often found along the bases of mountains.

Question 18

Delta

Answer 18

Sediment of distant mountains.