Question

which of the following best describes what happens to water molecules after they have condensed to form clouds? they will combine to form runoff and flow into rivers, lakes, and oceans. they will undergo evaporation and change to a gas. they will undergo transpiration and become water vapor. they will fall to earth as precipitation in the form of rain, sleet, or snow. question 21(multiple choice worth 4 points) (04.05 mc) which statement best describes the role of plants in the water and carbon cycles? plants release oxygen when they decompose and take in oxygen for photosynthesis. plants take in carbon dioxide during photosynthesis and absorb water through their leaves and roots. plants take in oxygen during photosynthesis and absorb carbon dioxide through their leaves and roots. plants use oxygen to perform photosynthesis and release carbon dioxide as a by-product.

Explanation:

• For the first question: Clouds are formed by water vapor condensation. Once condensed, water molecules fall as precipitation (rain, sleet, snow). Runoff occurs after precipitation. Evaporation is the opposite of condensation. Transpiration is water loss from plants.
• For the second question: In photosynthesis, plants take in carbon dioxide (\(CO_2\)) and water (\(H_2O\)). They release oxygen (\(O_2\)) as a by - product. When plants decompose, they release carbon. They absorb water mainly through roots (not leaves for significant amounts in most cases). They take in \(CO_2\) (not \(O_2\)) for photosynthesis.

Answer:

• First question: They will fall to Earth as precipitation in the form of rain, sleet, or snow.
• Second question: Plants take in carbon dioxide during photosynthesis and absorb water through their leaves and roots.