Sixth Grade Science Unit #6 Oceanography Pre Test


What is the primary driving force for surface ocean currents?



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What is the primary driving force for surface ocean currents?

A. density layering

B. global winds

C. water temperature differences

D. salt concentration

35. What properties of air are affected by oceans, rivers, and lakes that are beneath the air?

A. Both the temperature of air and the amount of water vapor in air are affected by the oceans, rivers, and lakes beneath the air.

B. The temperature of air is affected by the oceans, rivers, and lakes beneath the air, but the amount of water vapor in the air is not.

C. The amount of water vapor in air is affected by the oceans, rivers, and lakes beneath the air, but the temperature of the air is not.

D. Neither the temperature of air nor the amount of water vapor in air is affected by the oceans, rivers, and lakes beneath the air.



36.
A. Continental Shelf

B. Continental Slope

C. Abyssal Plain

D. Trench

37. What is the name of the volcanic chain on the ocean floor - (forms where oceanic crust pulls apart - new oceanic forms here)?

A. mid ocean ridge

B. volcanic island

C. seamount

D. abyssal plain

38.
What basic motion does water follow during the passage of a wave?


A. forward

B. backward

C. up and down

D. circular

39.
What is the primary driving force for surface ocean currents?
A. density layering

B. global winds

C. water temperature differences

D. salt concentration

40. What is the primary driving force for surface ocean currents?

A. density layering

B. global winds

C. water temperature differences

D. salt concentration

41.
As energy moves in waves through the water, the water moves

A. in a small vertical circle.

B. in waves toward the shore.

C. in the direction of the waves.

D. against the current



42.
Waves interact with the ocean floor as they near the coastline. Choose the answer the supports this statement.

A. Wave height decreases and wavelength increases as a waves gets closer to the shore.

B. Wave height increases and wavelength decreases as a waves gets closer to the shore.

C. Both the wave height and wavelength increase as the wave gets closer to shore.



D. There is no change in the wave height or wavelength as a waves gets closer to the shore.

43.
The diagram represents an ocean wave. Choose the statement that correctly describes the parts of an ocean wave.

A. 'A' represents wave height and 'D' represents wavelength

B. 'A' represents wavelength and 'D' represents wave height

C. 'A' represents the crest and 'D' represents the trough

D. 'A' represents the trough and 'D' represents the crest

44. Which statement about tsunamis is true?

A. The Pacific Ocean has the greatest occurance of tsunamis because it is the largest ocean.

B. The Pacific Ocean has the greatest occurance of tsunamis because it sits on several plates that interact with each other.

C. The Atlantic Ocean has the greatest occurance of tsunamis because it is split by the mid-ocean ridge.

D. The Atlantic Ocean has the greatest occurance of tsunamis because the gulf stream is a warm surface current causing hurricanes.

45. How do warm-water currents affect the coastal areas along which they flow?

A. They create greater rainfall along the coast.

B. They create unusually cool climates for the latitude.

C. They create unusually warm climates for the latitude.

D. They make the coastal climate cooler than the inland climate.

46. Compared with surface currents, deep currents are

A. colder and less dense.

B. warmer and less dense.

C. warmer and denser.

D. colder and denser.

47. The curved paths of global winds and surface currents are caused by

A. the rotation of the Earth.

B. cold air near the poles.

C. warm air near the equator.

D. continental deflection.

48. How does the warm current along the east coast of America affect the climate along the east coastal areas?

A. The climate will be warmer than inland

B. The climate will be colder than inland

C. The climate is not affected

D. The climate cannot be determined

49. The top of a pole at a beach was visible at 3pm, but later became submerged at 9pm. Your friend says the pole sank because the sand became loose at night. You disagree because you learned in your science class that the pole became submerged because of the following:

A. Low tides from a lack of recent rainfall

B. High tides caused by the Moon’s gravity

C. Smaller waves from a decrease in ocean currents



D. Stronger winds causing bigger waves

50.
At which two points are the LOW tides occurring in the figure below?
A. At points 1 and 2

B. At points 1 and 3



C. At points 2 and 3

D. At points 2 and 4

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