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 smoking a cigarette. This causes more or less oxygen to be available for diffusion in his lungs, so less oxygen will be absorbed into his blood?
less

When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser. When Shane goes swimming in warmer water, he can move about slowly, whereas in cooler water, Shane's movement is faster or slower?
faster

Rougher surfaces have more friction between them than smoother surfaces. If a surface were to be scratched up, it should encounter more or less friction?
more

If the gas is heated, the particles will move faster as they gain more energy. Jim is performing experiments in his lab. If he applies more heat to gas inside of a beaker, what happens to the gas particles move faster or move slower?
move faster