Q: The rocket goes upwards because the hot gases shoot downwards out of the nozzle. The faster the gases go downwards, the faster the rocket goes upwards.  Bob watched the rocket as it shoots into the sky. He sees that as the gases exiting the nozzle go slower, the rocket goes faster or slower?
A: slower


Q: The planets further from the Sun will have bigger orbits, and therefore take longer to revolve around the Sun.  Louis notices that Neptune is farther from the sun than Mercury. Which planet will take a shorter time to rotate around the sun Mercury or Neptune?
A: Mercury


Q: In the larger container we will still have the same number of gas particles, but now they are filling a much larger space.  If Jim has a container of hydrogen gas that is 50 liters in volume and he moves the gas to a container that is 40 liters in volume, what happens to the density of the gas increases or decreases?
A: increases


Q: A stronger acid produces a greater concentration of ions than a weaker acid.  If Jim increases the strength of an acid he is playing with, the concentration of ions in that acid falls or rises?
A: rises