Twenty Questions

Science 8: Fresh and Salt Water Systems

Twenty Questions

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6 7 8 9 10

11 12 13 14 15

16 17 18 19 20

1. How much of the water in the world is Fresh Water?

3%

2. What is it called when water changes state from a gas to a liquid?

Condensation

3. The largest supply of fresh water can be found in

Glaciers and Ice sheets

4. Striations, Cirques, horn, and aretes are all examples of

Glacial erosion

5. What is a Watershed?

A drainage basin, the area of land that drains into a body of water.

6. How does the ocean get its salt?

From rivers and groundwater flowing over rocks pick up salts from the rocks and carry them to the ocean.

7. What features of the sea floor are related to plate movements?

Ocean ridges and Trenches

8. As a wave reaches the shore the what happens to wavelength and wave height?

Wavelength shortens and Wave height increases.

9. How do waves shape the shorelines?

Waves shape shorelines by eroding and redepositing sediments.

10. What is the difference between Neap tides and Spring tides?

A neap tide creates smaller tidal movements; whereas spring tides create larger tidal movements.

11. Tidal movement is linked to what celestial body?

The Moon.

12. What are 3 factors that influence the direction of winds and surface currents?

1. Uneven heating of the atmosphere 2. Rotation of the Earth 3. The Continents

13. In what directions do westerly winds drive currents?

From the west to the east (Clockwise)

14. Gills are an example of?

An adaptation for aquatic animals

15. What is the name of plant plankton?

Phytoplankton

16. When the concentration of a toxin is magnified this is called

Biomagnification

17. What is the process some bacteria use to change chemicals into food and oxygen?

Chemosynthesis

18. Hard water contains more __________ and __________ than soft water

Calcium and Magnesium

19. What is the role of a bioindicator species?

Sensitive species whose numbers can show the health of an ecosystem

20. Water quality standards are set for?

1. drinking water for people 2. protection of organisms living in water 3. drinking water for livestock 4. irrigation for crops 5. recreation