Question 1

1.What is the % of ocean water compared to land?

Accepted Answer

1.	71% - ocean
29% - land

Question 2

2.This is the most abundant salt in ocean water. (Formula?)

Accepted Answer

2.	sodium chloride (NaCl)

Question 3

3.How did oceans form?

Accepted Answer

3. steam from volcanoes condensed causing rain, and comets

Question 4

4.Describe the salinity level at the mouth of a river.

Accepted Answer

4. less salty at the mouth of the river b/c freshwater dumps into the ocean

Question 5

5.Which zone is the temp. most constant? Why?

Accepted Answer

5. deep, more salt at the bottom and coldest

Question 6

6.As the salinity of the water increases what happens to the density?

Accepted Answer

6. density increases

Question 7

7.Where does oxygen in seawater come from?

Accepted Answer

7. atmosphere and algae

Question 8

8.Explain the salinity levels in warm temp. vs. cold temp. areas.

Accepted Answer

8. polar areas and warmer areas = high salinity; cooler = low

Question 9

9.What is the most important function of the ocean?

Accepted Answer

9. to balance temperature on Earth

Question 10

10.What properties increase as you descend through the water column in the ocean. (3)

Accepted Answer

10. salinity, density, pressure

Question 11

11.Where does salt come from?

Accepted Answer

11. freshwater rivers and streams dissolve rocks on the way down to the oceans bringing minerals

Question 12

12.Why are green plants not found on the ocean floor?

Accepted Answer

12. no sunlight so plants can’t survive

Question 13

13.Compare the rate of absorption between land and water.

Accepted Answer

13. land heats and cools off faster than water

Question 14

14.In the open ocean, which zone do algae live in? Why?

Accepted Answer

14. algae live on the surface b/c it’s closest to sun’s energy

Question 15

15.Which zone is the densest? Why?

Accepted Answer

15. Deep is densest because of cold temp. and more salinity

Question 16

16.What happens to the temp. in the thermocline/transition zone?

Accepted Answer

16. drastic drop in temp

Question 17

17.Which zone does salinity change the most? Why?

Accepted Answer

17. surface, b/c of climate, addition of freshwater (rivers)

Question 18

18.Which zone is most affected by weather?
Why?

Accepted Answer

18. surface b/c  it is closest to the atmosphere

Question 19

19. Why are submersibles useful?

Accepted Answer

19. People use this  vehicle to explore the ocean and to protect from extreme pressure and temperature.

Question 20

20.Why is it difficult to research the ocean floor?

Accepted Answer

20. too much pressure and too cold

Question 21

21.What process occurs at the mid-ocean ridge?

Accepted Answer

21. sea floor spreading

Question 22

22.What type of boundary are mid-ocean ridges found?

Accepted Answer

22. divergent

Question 23

23.What type of boundary are trenches found? Why

Accepted Answer

23. convergent – b/c more dense oceanic plate sinks under less dense continental plate

Question 24

24. A gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent.

Accepted Answer

24. continental shelf

Question 25

25.What process occurs at a trench?

Accepted Answer

25. subduction

Question 26

26.Describe the abyssal plain

Accepted Answer

26. flat, deep part of the ocean floor covered in mud

Question 27

27.What is happening to the Pacific that is the opposite of the Atlantic? Why is this happening?

Accepted Answer

27. Pacific is shrinking b/c of so many trenches

Question 28

28.A deep canyon in the ocean floor is called ___.

Accepted Answer

28. trench

Question 29

29.This feature of the ocean is the result of volcanoes rising above the surface.

Accepted Answer

29. volcanic island

Question 30

30.Explain how SONAR is used to map the ocean floor.

Accepted Answer

30. Ships at the surface send pulses down to the ocean floor and then time it takes to come back up is measured – used to map ocean floor

Question 31

31.The true gentle sloped edge of a continent, where rock that makes up the continent stops and the rock of the ocean floor begins.

Accepted Answer

31.  continental shelf

Question 32

32.These features are volcanoes under the surface of the ocean.

Accepted Answer

32. seamount

Question 33

33.What is the name of the research vehicle that explored the deepest parts of the ocean?

Accepted Answer

33. Alvin

Question 34

34. How do seasons and latitude (location affect the temperature at the surface zone?

Accepted Answer

34. Different seasons bring temperatures throughout the year; sun’s energy is more direct in areas closer to the equator.

Ch. 13 Oceans test

Oceans test

Question	Answer
1.What is the % of ocean water compared to land?	1. 71% - ocean 29% - land
2.This is the most abundant salt in ocean water. (Formula?)	2. sodium chloride (NaCl)
3.How did oceans form?	3. steam from volcanoes condensed causing rain, and comets
4.Describe the salinity level at the mouth of a river.	4. less salty at the mouth of the river b/c freshwater dumps into the ocean
5.Which zone is the temp. most constant? Why?	5. deep, more salt at the bottom and coldest
6.As the salinity of the water increases what happens to the density?	6. density increases
7.Where does oxygen in seawater come from?	7. atmosphere and algae
8.Explain the salinity levels in warm temp. vs. cold temp. areas.	8. polar areas and warmer areas = high salinity; cooler = low
9.What is the most important function of the ocean?	9. to balance temperature on Earth
10.What properties increase as you descend through the water column in the ocean. (3)	10. salinity, density, pressure
11.Where does salt come from?	11. freshwater rivers and streams dissolve rocks on the way down to the oceans bringing minerals
12.Why are green plants not found on the ocean floor?	12. no sunlight so plants can’t survive
13.Compare the rate of absorption between land and water.	13. land heats and cools off faster than water
14.In the open ocean, which zone do algae live in? Why?	14. algae live on the surface b/c it’s closest to sun’s energy
15.Which zone is the densest? Why?	15. Deep is densest because of cold temp. and more salinity
16.What happens to the temp. in the thermocline/transition zone?	16. drastic drop in temp
17.Which zone does salinity change the most? Why?	17. surface, b/c of climate, addition of freshwater (rivers)
18.Which zone is most affected by weather? Why?	18. surface b/c it is closest to the atmosphere
19. Why are submersibles useful?	19. People use this vehicle to explore the ocean and to protect from extreme pressure and temperature.
20.Why is it difficult to research the ocean floor?	20. too much pressure and too cold
21.What process occurs at the mid-ocean ridge?	21. sea floor spreading
22.What type of boundary are mid-ocean ridges found?	22. divergent
23.What type of boundary are trenches found? Why	23. convergent – b/c more dense oceanic plate sinks under less dense continental plate
24. A gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent.	24. continental shelf
25.What process occurs at a trench?	25. subduction
26.Describe the abyssal plain	26. flat, deep part of the ocean floor covered in mud
27.What is happening to the Pacific that is the opposite of the Atlantic? Why is this happening?	27. Pacific is shrinking b/c of so many trenches
28.A deep canyon in the ocean floor is called ___.	28. trench
29.This feature of the ocean is the result of volcanoes rising above the surface.	29. volcanic island
30.Explain how SONAR is used to map the ocean floor.	30. Ships at the surface send pulses down to the ocean floor and then time it takes to come back up is measured – used to map ocean floor
31.The true gentle sloped edge of a continent, where rock that makes up the continent stops and the rock of the ocean floor begins.	31. continental shelf
32.These features are volcanoes under the surface of the ocean.	32. seamount
33.What is the name of the research vehicle that explored the deepest parts of the ocean?	33. Alvin
34. How do seasons and latitude (location affect the temperature at the surface zone?	34. Different seasons bring temperatures throughout the year; sun’s energy is more direct in areas closer to the equator.

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