Water

Question 1

What is the significance of water to living things?

Answer 1

Water is essential to all forms of life from single-celled organisms to complex organisms, such as humans.

Question 2

what does the water cycled do?

Answer 2

it recycles water to supply different compartments

Question 3

condensation

Answer 3

water that forms clouds

Question 4

percipitation

Answer 4

releasing water from the atmosphere(rain and snow)

Question 5

runoff

Answer 5

water that travels along the surface of the earth that goes into bodies of water or seeps into the ground

Question 6

ground water

Answer 6

water stored underground

Question 7

evaporation

Answer 7

vaporized water that goes into the atmosphere from bodies of water

Question 8

transpiration

Answer 8

vaporized water that goes into the atmosphere from plants

Question 9

what perecent of the world is water?

Answer 9

70%

Question 10

what percent of the world’s water is in oceans?

Answer 10

97%

Question 11

what percent of the world’s water is fresh water?

Answer 11

3%

Question 12

ice caps/glaciers make up what percent of freshwater?

Answer 12

68.7%

Question 13

groundwater makes up what percent of freshwater?

Answer 13

30.1%

Question 14

surface water makes up what percent of freshwater?

Answer 14

0.3%

Question 15

why is it so important for humans to kee water sources clean?

Answer 15

There is an extremely small amount of fresh water available, which is why taking care of our water is so vital.

Question 16

what are some threats to safe drinking water?

Answer 16

Improper waste management, harmful chemicals dumped into water, naturally occurring bacteria and viruses, nitrates from broken down organisms

Question 17

watershed

Answer 17

An area where water runs off into a specific body of water. drains into one area from multiple sources.

Question 18

what determines watershed boundaries?

Answer 18

gravity and typography(elevation)

Question 19

What are the two watershed districts that Edina is a part of?

Answer 19

9-mile and Minnehaha creek

Question 20

what is the purpose of a watershed?

Answer 20

flood protection(old goal),monitor water quality, regulate flow, groundwater and wetland protection

Question 21

define water pollution

Answer 21

any physical, biological, or chemical change in water quality

Question 22

what are various ways water can be considered polluted?

Answer 22

imbalance of naturally occurring chemicals(nitrate, phosphorous), Ph levels, other chemicals

Question 23

What are the two main categories of human pollution

Answer 23

point source and non-point source pollution

Question 24

point source pollution

Answer 24

knowing the exact source of pollution, such as a pipe leak

Question 25

non-point source pollution

Answer 25

not knowing the exact source of pollution, such as runoff from farm fields

Question 26

what level of chlorine is best?

Answer 26

0.75ppm or less

Question 27

what level of dissolved oxygen is best?

Answer 27

should be greater than 6ppm, but dangerous for aquatic life if under 2ppm

Question 28

what level of nitrate is best?

Answer 28

less than 4ppm

Question 29

what level of phosphate is best?

Answer 29

0.03ppm or less

Question 30

what level of pH is best?

Answer 30

6.5-8.2

Question 31

turbidity

Answer 31

more turbid water is the less deep you can see into the water. drinking water should never exceed 1 NTU

Question 32

Oligotrophic

Answer 32

clean and unpolluted, diverse aquatic life, little organic waste

Question 33

Eutrophic

Answer 33

many decomposers, mucky and polluted, low diversity of aquatic life