Which best describes how air moves during convection?
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a. cool air warms as it mixes with denser air.
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b. warm air cools as it falls through cooler, denser air.
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c. warm air rises as cooler, denser air falls.

The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?

What happens as electrons move along the chain of molecules known as the electron transport chain? they gain energy, which causes atp molecules to lose phosphate groups. they gain energy, which causes h *ions to join with oxygen to produce water. they lose energy, which is then used by the cell to make atp. they lose energy, which is then used to break down atp.

The fluid mosaic model of the membrane proposed that membranes