Q: What is the term for a process that changes some chemical substances into others? Choices: - acid reaction - toxic reaction - chain reaction - chemical reaction A:
chemical reaction

Q: What occurs when waves interact with other waves? Choices: - resurgence - vibration - frequency - interference A:
interference

Q: What measurement is used to describe the amount of water vapor in the air? Choices: - precipitation - barometric pressure - heat - humidity A:
humidity

Q: In a smoke detector, a battery in the electric circuit creates what between the metal plates? Choices: - magnetism - hydrogen - cooling - voltage A:
voltage