What is the first thing that happens when heat is applied to water? Transpiration Evaporation Hydrogen bonds break Condensation QUESTION 2 Why are certain gases called “greenhouse gases?” O Because they contain chlorophyll, which is green Because they trap heat, similar to what a greenhouse does Because they are byproducts of crops engaged in photosynthesis Because they are gases that are used in greenhouses to keep plants warm in the winter QUESTION 3 Carbon is present in: sugar DNA carbon dioxide all of the above QUESTION 4 What do the stomata do? They allow oxygen into the plants They allow carbon dioxide to leave the plants They allow oxygen to leave the plant and carbon dioxide to enter the plant They remain open longer on hot days to facilitate gas exchange QUESTION 5 Why is controlling carbon dioxide emissions particularly important in our daily lives? The U.S. produces carbon dioxide at three times the global average. The U.S. has 4% of the population but 25% of the carbon dioxide fossil fuel emissions. Carbon dioxide is a greenhouse gas All of the above
