*Question*
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. Will is not smoking a cigarette anymore. This causes more or less oxygen to be available for diffusion in his lungs, so more oxygen will be absorbed into his blood?
**Answer**
more

*Question*
Air pressure is less at higher elevations. Marcus is climbing a mountain, and notices that it is more difficult to breathe than it was before. This is likely because Marcus is at a lower elevation or higher elevation?
**Answer**
higher elevation

*Question*
Areas near the equator are warmer than areas near the poles because they receive more direct sunlight. Sandra wants to go on vacation, and would like to go somewhere cold. Sandra will likely choose a place near the equator or near the poles?
**Answer**
near the poles

*Question*
The water table is higher when there is a lot of rain and lower when the weather is dry. If Mona lives in a country that doesn't get a lot of rain and it rains extra hard one day, what does that do to the water table increases or decreases?
**Answer**
increases