chpt 4

Question 1

earths center is called

Answer 1

core

Question 2

the zone that has most of earths mass

Answer 2

mantle

Question 3

liquid rock within earth is called

Answer 3

magma

Question 4

explains how forces within the planet create landforms

Answer 4

plate tectonics

Question 5

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

Answer 5

continental drifts

Question 6

the crust stretches until it breaks is called

Answer 6

rift valley

Question 7

the worlds flattest and smoothest regions.

Answer 7

abyssal plains

Question 8

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

Answer 8

continental shelves

Question 9

the deep valley marking the plate collision is called

Answer 9

trench

Question 10

are places where rocks have been compressed into bends

Answer 10

folds

Question 11

places where rock masses have broken apart and moved away from each other

Answer 11

faults

Question 12

rocks break and decay over time in a process called what

Answer 12

weathering

Question 13

smaller particles of gravel, sand, and mud called

Answer 13

sediment

Question 14

the movement of surface material from one location to another

Answer 14

erosion

Question 15

thick masses of ice

Answer 15

glaciers

Question 16

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

Answer 16

plateau

Question 17

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

Answer 17

alluvial fan

Question 18

sediment that sinks in the ocean and the sediment may accumulate is called

Answer 18

delta

Question 19

the movement of water through the hyrdosphere is called

Answer 19

hydrologic cycle

Question 20

the first and smallest streams from this runoff are called

Answer 20

headwaters

Question 21

any smaller stream or river that flows into a larger stream or river is called

Answer 21

tributary

Question 22

the whole region drained by a river and its tributaries is called

Answer 22

watershed or drainage

Question 23

forms where forms where a river meets an inlet, or small arm, of the sea is called

Answer 23

estuaries

Question 24

any landscape that covered with water for at least part of the year

Answer 24

wetlands

Question 25

near the surface, bacteria, insects, and worms break down the plants and animal material into a mixture called

Answer 25

humus

Question 26

moves the nutrients out of the reach of plants

Answer 26

leaching

Question 27

farmers can control erosion by using this

Answer 27

contour plowing

Question 28

the soil nutrients becomes nearly useless for farming

Answer 28

soil exhaustion

Question 29

planting different crops in alternating years

Answer 29

crop rotation

Question 30

salt build up in the soil is called

Answer 30

soil saliniztion