Topic 1-Fresh & Saltwater Systems

Question 1

Potable Water

Answer 1

Water that is safe for humans to drink.

Question 2

Water Quality

Answer 2

How pure or dirty the water is.

Question 3

Salinity

Answer 3

Amount of dissolved salts in water.

Question 4

Hard Water

Answer 4

Water containing high amounts of calcium and magnesium.

Question 5

What percent of the water is saltwater?

Answer 5

97%

Question 6

What percent of freshwater is found in rivers, lakes and ponds?

Answer 6

0.02%

Question 7

What percent of freshwater is frozen in glaciers?

Answer 7

2%

Question 8

What percent of freshwater is groundwater?

Answer 8

0.63%

Question 9

What is water tested for to make sure it is potable?

Answer 9

Taste
Odour
Cloudiness/Colour
Toxicity/Pollution
Mineral Content
pH Level
Dissolved Oxygen 
Solids, including floating minerals
Dissolved solids

Question 10

How to power stations effect the water supply?

Answer 10

They sometimes discharge warm water into lakes and rivers that can kill some animals.

Question 11

How do factories affect the water supply?

Answer 11

They might add dangerous chemicals to the water or practice thermal pollution.

Question 12

How does runoff affect the water supply?

Answer 12

Runoff from farmland contains fertilizers that cause excessive plant growth.

Question 13

How does sewage affect the water supply?

Answer 13

Sewage contains large amounts of nitrogen, which causes the number of micro-organisms to increase.