Fresh & Salt water Systems Checkpoint One

Question 1

How much of Earth’s surface is water?

Answer 1

71%

Question 2

What are the two influences of the many variations of Earth’s water supply?

Answer 2

1) Natural occurances

2) Human Activities

Question 3

What three forms do the water on Earth exist as?

Answer 3

1) Solid (ice)
2) Liquid (liquid water)
3) Gas (water vapour)

Question 4

How much does freshwater make up of the water on earth? How much is available for humans?

Answer 4

3% of Earth’s water is freshwater.

1% of that is available of humans; 0.03% of all the water on Earth

Question 5

How many oceans are there on earth?

Answer 5

4:

• Pacific Ocean
• Atlantic Ocean
• Indian Ocean
• Antarctic/ Southern Ocean

Question 6

Why are oceans SALTY? Why are rivers NOT SALTY?

Answer 6

• Oceans and sees red by river and rain water.
• River water picks up small deposits of minerals, eventually wash out to the oceans and make it salty
• Individual rivers do not have enough minerals to be salty, but in Oceans many river connect and the minerals pile up.