5. Classify: Astronomers classify the eight planets in our solar system into two groups: terrestrial planets and gas giants. Terrestrial planets have rocky surfaces, while gas giants
are composed mainly of gas. Based on your data, classify each planet as a terrestrial planet
or a gas giant. (Hint: Look at the density of each planet.)

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

The amount of potential energy possessed by an elevated object is equal to