Q: Does warm air sit above or below cooler air in the troposphere? Choices: - above - adjacent - near - below A:
below

Q: What occurs when a cold air mass runs into a warm air mass? Choices: - an occluded front - a stationary front - a snow day - a cold front A:
a cold front

Q: Q: Calcium hydroxide and calcium carbonate are effective in neutralizing the effects of what on lakes? Choices: - oil rain - ozone rain - dioxide rain - acid rain A:
A: acid rain

Question: Q: What is polyisoprene better known as? Choices: - rayon - styrofoam - silicon - rubber A:
Answer: rubber

*Question*
Q: Before the atmosphere became oxygenated, the planet was subjected to what harmful energy source, meaning the first organisms would have flourished where they were more protected? Choices: - evaporation - conduction - convection - radiation A:
**Answer**
radiation

Q: The three layers of protective coverings of the spinal cord is called what? Choices: - dermis - tendons - muscles - meninges A:
meninges