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Winds and air currents differ in the aspect that ________

Winds and air currents differ in the aspect that ________ Correct Answer Winds are horizontal movements of air while air currents are the vertical movements of air

Winds and air currents differ in the aspect that Winds are horizontal movements of air while air currents are the vertical movements of air. Air currents are concentrated areas of winds. All winds result from horizontal differences in air pressure.

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Which of these statements are correct?
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2. Ocean currents assist in maintaining the Earth's heat balance.
3. Ocean currents are set in motion primarily by prevailing winds.
4. Ocean currents are affected by the configuration of the ocean.
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Consider the following statements in respect of slow sand filter and rapid sand filter: 1. The two filters differ in respect of the standards regarding the non-uniformity of the sand used in their filtering media. 2. The two filters do not differ in respect of the effective size of the sand used in them. 3. The two filters differ in respect of their respective under-drainage system. 4. The two filters differ in respect of their respective rate of filtration. Which of the above statements are correct? 
Which of these statements are correct?
1. Ocean currents are the slow-surface movement of water in the ocean
2. Ocean currents assist in maintaining the Earth's heat balance
3. Ocean currents are set in motion primarily by prevailing winds
4. Ocean current are affected by the configuration of the ocean
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Which of the following are reasons for the chief fishing grounds being located in continental shelf areas where cold and warm currents meet?
I. Warm currents are rich in phosphates and nitrates
II. Plankton - the chief fish feed - thrives in these regions
III. The meeting of cold and warm currents allows the water to be well aerated
IV. The epicontinental seas allow sunlight to reach almost to the bottom