Suppose Earth Were to Cool Down a Little

question 17

Multiple Choice

Suppose Earth were to cool down a little.How would the carbon dioxide cycle tend to restore temperatures to normal?

• A)Cooler temperatures cause volcanoes to become more active,so they release more carbon dioxide into the atmosphere than they do when temperatures are warmer.
• B)Cooler temperatures allow carbon dioxide to form rain and rain out of the atmosphere.
• C)Cooler temperatures mean more ice and more erosion,which somehow makes the planet warm up.
• D)Cooler temperatures lead to slower formation of carbonate minerals in the ocean,so carbon dioxide released by volcanism builds up in the atmosphere and strengthens the greenhouse effect.