Water Systems Grade 8

Question 1

What is surface water?

Answer 1

Water that collects above ground in surface run-off, streams, rivers, creeks, lakes, ponds, marshes, swamps and oceans

Question 2

What is groundwater?

Answer 2

Underground water seepage into a river, stream, creek or basin

Question 3

What is a watershed?

Answer 3

An area that drains all precipitation received as a run-off or base flow into a particular river or set of rivers. The water flows from high elevation to low elevation into a large basin of water

Question 4

What is a watershed divide?

Answer 4

A point of high elevation between two watersheds, which separates them

Question 5

What is a tributary?

Answer 5

A smaller stream or river which flows into the main stem of the river

Question 6

What floats and sinks in salt and freshwater?

Answer 6

Rubber: SW- Sink, FW- Sink
Die: SW- Float, FW- Sink
Counter: SW- Float, FW- Sink
Cube: SW- Float, FW- Float

Question 7

Why does freshwater float on top of saltwater?

Answer 7

The saltwater is more dense than freshwater. The salt particles cause the water to be more dense