Wind and ocean currents are caused by convection. Convection is heat transfer by mass motion of a fluid like the water. When the heated fluid is caused to move away from the source of heat, carrying energy. Above a hot surface, convection occurs because hot air expands, rises because it's denser.
Answer:
C. Purchasing the Louisiana Territory for the price of $15 million
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Earth’s atmosphere has layers of gas surrounding it, our planets atmosphere is retained by it's gravity.
Earths Atmosphere contains;
78% Nitrogen
21% Oxygen
0.97% Argon
0.04% Carbon Dioxide
This mixture of gas is known for as air.
Answer: c. Over the span of 10 to 1,000 years, groundwater behaves as a renewable resource.
Explanation:
Answer and Explanation:
It is true fact that organic matter in soil diminishes with time yet it is unseemly to utilize this information for lab manual since we make heaps of changes to recoup natural issue in the dirt before going for another period of editing. Notwithstanding when the yield is reaped, the buildup of the previous harvest goes about as a natural fuel for the following yield. Here and there when we develop vegetable harvest, it rather adds minerals to the soil.
But if there is comparison between earlier soil and current soil, I figure it would be nearly increasingly precise for the as of late cleared soil since here, we can quantify the exhaustion of natural issue plainly. while the soil which had been cultivated and prepared for horticulture before, there probably come different changes because of enormous number of factors.l