In erosion, the higher the elevation, the farther the stream is from where it will reach base level and the more cutting it has to do.  If Milo is observing a stream at a low elevation and he follows the stream up to a higher elevation, what happens to the amount of cutting the stream has to do when eroding the stream bed beneath it increases or decreases?
increases

The more cylinders a car engine has, the more powerful its engine can be.  Mona is designing a car in a factory. If she decides to add more cylinders to the car's engine, what happens to the power that engine can output increased or decreased?
increased

The more curved the surface of a lens is, the more it refracts light.  Jeff built a lens with the highest refraction possible. The lens is likely very or not curved?
very