More water allows more chemical reactions. By pouring a cup of water into two dry powders that would react if they were hydrated, does the rate at which the powders decrease? or increase?
increase

Warm air is less dense than cool air, so it rises higher in the troposphere. Fred started a fire on the beach. The air distant from the fire likely falls or rises?
falls

Richer nations use far more energy resources, especially fossil fuels, than poorer nations do. Suzie is studying different countries and the amount of energy sources they use. She finds that South Africa is poorer than the United States. Therefore, South Africa or the United States uses less energy sources?
South Africa