Science test on 11/17

Question 1

water shortage

Answer 1

too little or too great a demand for water

Question 2

irrigation

Answer 2

process of supplying water to areas of land to make them suitable for growing crops

Question 3

3 ways to conserve water

Answer 3

reduce water, reuse water, recycle water

Question 4

which one is hydrogen and hydroxen

Answer 4

acid-hydrogen
base-hydroxen

Question 5

alkaline

Answer 5

solutions containing bases

Question 6

pH scales

Answer 6

-pH < 7 → acidic
- pH = 7 → neutral
- pH > 7 → basic

Question 7

water quality

Answer 7

a measurement of the substances in water besides water molecules

Question 8

concentration

Answer 8

the amount of one substance in a certain volume of another substance

Question 9

water treatment proccess

Answer 9

first filtration
coagulation
second filtration
chlorination
aeration
additional treatment

Question 10

pollutant

Answer 10

substances that cause water pollution

Question 11

point source

Answer 11

-specific sources of pollution can be identified
-ex. pipe spewing pollutants into a river

Question 12

non point source

Answer 12

-widely spread source of pollution that cannot be tied to a specific point of origin
- ex. runoff from a farm field

Question 13

pesticides

Answer 13

chemicals intended to kill insects that damage crops

Question 14

sources of water pollution

Answer 14

human wastes, industrial wastes, chemical runoff

Question 15

industry-produces pollutanats

Answer 15

chemicals, smoke, heated water

Question 16

potential energy

Answer 16

stored energy waiting to be used

Question 17

kinetic energy

Answer 17

energy in motion

Question 18

hydroelectric power plant

Answer 18

reservoir, penstock, generator, transformer, spillway

Question 19

reservoir

Answer 19

a lake formed by a dam that stores water

Question 20

penstock

Answer 20

pipe through which water flows from a reservoir to a turbine

Question 21

generator

Answer 21

uses electromagnets to change mechanical energy into electrical energy

Question 22

transformer

Answer 22

changes the generated electrical energy into the electricity used in homes

Question 23

spillway

Answer 23

transports excess water from a reservoir to a river