Unit 2

Question 1

the process of turning from liquid into vapor

Answer 1

evaporation

Question 2

the process of turning from a vapor into liquid

Answer 2

condensation

Question 3

communities of plants and animals

Answer 3

ecosystem

Question 4

liquid rock within Earth

Answer 4

magma

Question 5

the process in which rocks break and decay over time

Answer 5

weathering

Question 6

small particles of weathered rock

Answer 6

sediment

Question 7

movement of surface material from one place to another by water, wind, and ice.

Answer 7

erosion

Question 8

thick masses of ice

Answer 8

glacier

Question 9

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

Answer 9

Plateau

Question 10

the process of removing salt from ocean water

Answer 10

Desalinization

Question 11

first and smallest streams formed from the runoff of a mountain, eventually forming rivers

Answer 11

headwaters

Question 12

any small river or stream that flows into a larger body of water

Answer 12

tributary

Question 13

broken-down plant and animal matter found on soil

Answer 13

humus

Question 14

plowing fields across a hill, rather than up and down a hill

Answer 14

contour plowing

Question 15

the practice of planting different crops in a field alternating years

Answer 15

crop rotation

Question 16

rock layers where groundwater is plentiful

Answer 16

aquifers

Question 17

a regional variety of a language

Answer 17

dialect

Question 18

destruction or loss of forests

Answer 18

deforestation

Question 19

the replanting of a forest

Answer 19

reforestation

Question 20

downward movement of minerals and humus in soils

Answer 20

leaching

Question 21

the average number of people that live in an area

Answer 21

population density

Question 22

boundaries that follow a feature of the landscape

Answer 22

natural boundary

Question 23

growth in the proportion of people living towns and cities

Answer 23

urbanization

Question 24

the world’s flattest and smoothest regions (located on the ocean floor)

Answer 24

abyssal plain

Question 25

belief and worship of more than one god

Answer 25

polytheism

Question 26

taxes on imports and exports

Answer 26

tarrifs

Question 27

an economic system in which the government decides what to produce, where to make it, and what to charge for it

Answer 27

command economy

Question 28

percentage of people who can read and write

Answer 28

literacy rate

Question 29

the number of live births each year for every 1,000 people living in a place

Answer 29

Birthrate

Question 30

an economic system in which people choose freely what to buy and sell

Answer 30

market economy

Question 31

Islamic houses of worship

Answer 31

mosque

Question 32

the goods a country brings in from other nations

Answer 32

import

Question 33

the goods a country sells or trades with another nation

Answer 33

export

Question 34

the ability to produce something at a lower opportunity cost than another country can

Answer 34

comparative advantage

Question 35

use of tactics that make imported goods more expensive then domestic goods

Answer 35

protectionism

Question 36

a limit places on the amount of a particular good that enters a country

Answer 36

quota

Question 37

a payment or other benefit given by the government to help a domestic power.

Answer 37

subsidy

Question 38

a nation's exports minus its imports

Answer 38

balance of trade