Oceanography (Grade 10)
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Oceanography
1.
What causes spring tides?
- the alignment of the Moon and the Sun at 180 degrees
- the alignment of the Moon and Sun at 90 degrees
- the alignment of the Moon and Sun at 45 degrees
- the Sun's position does not matter because it is too far away
2.
Which has the greatest effect on changing tides?
- time of the day
- length of the shoreline
- size of the Sun
- pull of the Moon's gravity
3.
The most common source of energy for surface waves is
- wind.
- earthquakes.
- tides.
- volcanoes.
4.
Extremely long wavelength, low amplitude ocean waves resulting from submarine earthquakes are called .
- tsunamis
- surface waves
- L waves
- orbital waves
5.
Which ocean movement is slow-moving and occurs in deep waters?
- surface currents
- upwelling
- density currents
- waves
6.
Which type of seawater has the greatest density?
- warm, with low salinity
- warm, with high salinity
- cold, with low salinity
- cold, with high salinity
7.
Which of the following does NOT affect wave height in deep water?
- wavelength
- wind speed
- wind duration
- fetch
8.
The most prominent features of the ocean basins are the . They are the mountains of the deep ocean floor.
- continental rises
- hydrothermal vents
- ocean basins
- mid-ocean ridges
9.
A trench is
- undersea mountain chain.
- boundary where the ocean and land meet.
- V-shaped valley on the ocean floor where old floor is subducted.
10.
Which of the following is used to measure ocean depth?
- bottom dredges
- nets
- sonar
- tidal patterns
11.
This layer of the ocean is characterized by rapidly changing temperature.
- the surface layer
- the thermocline
- the bottom layer
- the arctic bottom layer
12.
The movement of the ocean floor on either side of a mid-ocean ridge is best known as
- rifting.
- glaciation.
- ocean-floor spreading.
- subduction.
13.
Each cycle of spreading and magma intrusion along an ocean ridge results in the formation of .
- iron
- isochron
- new ocean crust
- new continental crust
14.
The rising of deep cold currents to the ocean surface is called
- surfing.
- mapping.
- reefing.
- upwelling.
15.
Creatures that live in the deep ocean need to adapt to which environmental factor?
- lack of food
- high pressure
- low levels of salt
- high temperatures
16.
Which process does NOT add salt to seawater?
- weathering of continental rock washed to the ocean by rivers and streams
- decay of hard-shelled sea creatures
- rain
- volcanoes
17.
Island arcs form along
- subduction zones.
- rapidly spreading mid-ocean ridges.
- transform faults.
- wide continental shelves.
18.
Organisms that live on the ocean floor are .
- benthos
- nekton
- plankton
- diatoms
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