Question: Answer the following question given this paragraph: Greenhouse gases include CO 2 , H 2 O, methane, O 3 , nitrous oxides (NO and NO 2 ), and chlorofluorocarbons (CFCs). All are a normal part of the atmosphere except CFCs. The table below shows how each greenhouse gas naturally enters the atmosphere ( Table below ). Q: Co 2 , h 2 o, methane, o 3 , nitrous oxides (no and no 2 ), and chlorofluorocarbons (cfcs) are known as what type of gases? Choices: - chemical gases - hydrogen gases - carbonate gases - greenhouse gases A:
Answer: greenhouse gases

Question: Answer the following question given this paragraph: Electric potential energy comes from the position of a charged particle in an electric field. For example, when two negative charges are close together, they have potential energy because they repel each other and have the potential to push apart. If the charges actually move apart, their potential energy decreases. Electric charges always move spontaneously from a position where they have higher potential energy to a position where they have lower potential energy. This is like water falling over a dam from an area of higher to lower potential energy due to gravity. Q: What kind of energy comes from the position of a charged particle in an electric field? Choices: - solar energy - mechanical energy - thermal energy - potential energy A:
Answer: potential energy

Question: Answer the following question given this paragraph: The Calvin cycle has three major steps: carbon fixation, reduction, and regeneration. All three steps take place in the stroma of a chloroplast. Q: What is the first step of the calvin cycle called? Choices: - dioxide fixation - carbon maturation - breath fixation - carbon fixation A:
Answer:
carbon fixation