Answer the following question given this paragraph: Ozone near the ground harms human health. But the ozone layer in the stratosphere protects us from solar rays. That's why people were alarmed in the 1980s to learn that there was a hole in the ozone layer. Q: What does ozone in the stratosphere protect us from? Choices: - comets - acid rain - solar traces - solar rays A:
solar rays
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
Q: Answer the following question given this paragraph: The kinetic-molecular theory as it applies to gases has five basic assumptions. Q: The kinetic-molecular theory as it applies to gases has how many basic assumptions? Choices: - four - two - seven - five A:
A: five
Question: Answer the following question given this paragraph: Emphysema is a disease in which the walls of the alveoli break down so less gas can be exchanged by the lungs. The main symptom of emphysema is shortness of breath. The damage to the alveoli is usually caused by smoking and is permanent. Q: What disease associated with smoking involves breakdown of walls of the alveoli, resulting in less gas exchange by the lungs? Choices: - leukemia - cancer - pneumonia - emphysema A:
Answer: emphysema
*Question*
Answer the following question given this paragraph: Q: Synaptic connections can change over time depending on what? Choices: - weight - diet - age - activity level A:
**Answer**
activity level
Q: Answer the following question given this paragraph: Q: In which phase do the chromosomes duplicate? Choices: - prophase - metaphase - mitosis - interphase A:
A: interphase