Q: What does ozone in the stratosphere protect us from? Choices: - comets - acid rain - solar traces - solar rays A:
solar rays

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: Q: The kinetic-molecular theory as it applies to gases has how many basic assumptions? Choices: - four - two - seven - five A:
A: five

Question: 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*
Q: Synaptic connections can change over time depending on what? Choices: - weight - diet - age - activity level A:
**Answer**
activity level

Q: Q: In which phase do the chromosomes duplicate? Choices: - prophase - metaphase - mitosis - interphase A:
A: interphase