The full box is harder to move because it has greater mass and therefore greater inertia. If Jimbo is creating a ball from clay and he removes more clay to the ball, what does he do to the ball's inertia increases it or decreases it?
decreases it

Water also gets colder as you go deeper. Going deeper into water will result in a warmer or colder temperature?
colder

The density of the atmosphere decreases with an increase in the height above sea level (altitude). If Milo is hiking up a mountain and taking atmospheric density readings, what will happen to the readings as he gets closer to the top of the mountain increase or decrease?
decrease