Q: Smoking reduces the amount of oxygen available for diffusion at the lungs, so less oxygen gets absorbed and blood is oxygenated to a lesser degree. Jim has never been a smoker. If he suddenly starts smoking cigarettes the amount of oxygen available in his lungs increases or decreases?
A: decreases

Q: The main law is the law of superposition. This law states that deeper rock layers are older than layers closer to the surface. If Jim is exploring layers of rock and he moves closer to the surface, what happens to the age of the rock older or younger?
A: younger

Q: The stronger the winds are blowing, the larger the waves are and the more energy they have. Waves can be made by wind, on a windy day would we expect to have larger waves or smaller waves?
A: larger waves

Q: The warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering. Plants grow more poorly in the tundra because it is colder or warmer?
A: colder