The closer the field lines are drawn together, the stronger the field being described.  Having read the above passage, choose the right answer to the following question (choices are increases or decreases ):   Jimbo was playing with magnetic field lines by manipulating them. If he moves the field lines closer together, what happens to the strength of the field increases or decreases?
increases

Air pressure is less at higher elevations.  Having read the above passage, choose the right answer to the following question (choices are low or high ):   We don't need oxygen masks when we descend Everest because the air pressure is low or high?
high

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.  Having read the above passage, choose the right answer to the following question (choices are more or less ):   More oxygen absorption means more or less oxygen in the blood?
more