Answer the following question given this paragraph: Chemistry is the study of matter and energy and how they interact, mainly at the level of atoms and molecules. Basic concepts in chemistry include chemicals, which are specific types of matter, and chemical reactions. In a chemical reaction, atoms or molecules of certain types of matter combine chemically to form other types of matter. All chemical reactions involve energy. Q: What is the study of the interaction between matter and energy called? Choices: - astronomy - climatology - geology - chemistry A:
chemistry
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Answer the following question given this paragraph: As you can see from Figure above , a mitochondrion has an inner and outer membrane. The space between the inner and outer membrane is called the intermembrane space. The space enclosed by the inner membrane is called the matrix. The second stage of cellular respiration, the Krebs cycle, takes place in the matrix. The third stage, electron transport, takes place on the inner membrane. Q: What do mitochondrions have an inner and outer version of? Choices: - protein - Molecule - Fatty Acids - membrane A:
membrane
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Answer the following question given this paragraph: Many chemical reactions and physical processes release energy that can be used to do other things. When the fuel in a car is burned, some of the released energy is used to power the vehicle. Free energy is energy that is available to do work. Spontaneous reactions release free energy as they proceed. Recall that the determining factors for spontaneity of a reaction are the enthalpy and entropy changes that occur for the system. The free energy change of a reaction is a mathematical combination of the enthalpy change and the entropy change. Q: Spontaneous reactions release what type of energy, meaning it is available to do work? Choices: - potential energy - radioactive energy - kinetic energy - free energy A:
free energy
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Answer the following question given this paragraph: The Permian Period ended with Earth's second mass extinction. During this event, most of Earth's species went extinct. It was the most massive extinction ever recorded. It's not clear why it happened. One possible reason is that a very large meteorite struck Earth. Another possibility is the eruption of enormous volcanoes. Either event could create a huge amount of dust. The dust might block out sunlight for months. This would cool the planet and prevent photosynthesis. Q: What happened to earth's species during the permian period? Choices: - evolution - duplication - division - mass extinction A:
mass extinction
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