unit 10

Question 1

a drop in the bucket

Answer 1

a very small amount

Question 2

accumulate

Answer 2

to collect something together over time

Question 3

adequate

Answer 3

enough

Question 4

algae

Answer 4

plants with no stems or leaves that grow in water

Question 5

astonishing

Answer 5

very surprising

Question 6

boil

Answer 6

to produce bubbles of vapor in liquids when heated

Question 7

carry out

Answer 7

to put something into action

Question 8

conserve

Answer 8

to use something carefully so it lasts a long time

Question 9

contaminate

Answer 9

to make something dirty or harmful

Question 10

dub

Answer 10

to name

Question 11

dwindle

Answer 11

to decrease in number

Question 12

epic

Answer 12

very large and impressive

Question 13

evaporate

Answer 13

to cause a liquid to change to a gas

Question 14

faucet

Answer 14

a device that controls the flow of water from a sink or bath; the tap

Question 15

freeze

Answer 15

to turn a liquid into a solid

Question 16

freshwater

Answer 16

water that is not salty

Question 17

glide

Answer 17

to move in a quiet and smooth way

Question 18

have access

Answer 18

to have something available to see or use

Question 19

in hot water

Answer 19

in trouble

Question 20

indigenous

Answer 20

belonging to the place or country where something is found; native

Question 21

lava

Answer 21

hot liquid rock that comes out of a volcano

Question 22

let off steam

Answer 22

to release one’s repressed emotions

Question 23

Maya

Answer 23

the civilization based in southern Mexico and northern Central America that prospered from 600 BCE to 900CE

Question 24

melt

Answer 24

to change from a solid to a liquid state usually through heat

Question 25

mercury

Answer 25

a silver-colored liquid metal that is used in thermometer

Question 26

mineral

Answer 26

a natural substance usually obtained from the ground

Question 27

mist

Answer 27

large number of tiny water droplets in the air, which creates a kind of fog

Question 28

mouthwatering

Answer 28

something very appetizing in appearance, aroma or description

Question 29

muddy

Answer 29

covered with mud; not clear or pure

Question 30

plunge

Answer 30

to move suddenly downward

Question 31

potable

Answer 31

suitable for drinking

Question 32

pour

Answer 32

to flow or cause to flow

Question 33

propel

Answer 33

to push or move something forward

Question 34

purify

Answer 34

to make something clean

Question 35

restore

Answer 35

to return something to its original

Question 36

run

Answer 36

to let flow

Question 37

rust

Answer 37

a brown substance that forms on metals that come in contact with water

Question 38

saturate

Answer 38

to soak

Question 39

scarce

Answer 39

limited, in short supply

Question 40

seep

Answer 40

to flow slowly and in small amounts (liquids and gases)

Question 41

shortage

Answer 41

a lack of something

Question 42

sinkhole

Answer 42

a hollow place or depression that collects water

Question 43

sip

Answer 43

to drink little by little

Question 44

soak

Answer 44

to wet something completely; to saturate

Question 45

spill

Answer 45

to accidentally flow from a container

Question 46

symbiosis

Answer 46

relationship between two different organisms that benefits both

Question 47

take the plunge

Answer 47

to do something decisively especially after a period of hesitation

Question 48

tap

Answer 48

faucet

Question 49

toxic

Answer 49

poisonous

Question 50

underworld

Answer 50

the place where spirits of the dead live

Question 51

vast

Answer 51

extremely large

Question 52

water under the bridge

Answer 52

events that are past and done with