Have you ever been on a roller coaster? It goes up and down and around! Roller coasters use something called ____ to make them work. Physics is like the rules of how things ____. Roller coasters use ____ and energy to go fast and be fun. First, the roller coaster goes up a big ____. It goes slow, clank-clank-clank. When it gets to the top, it stops for a second. At the top of the hill, the car has lots of *potential energy*. Potential energy is like stored energy. It is ready to go! Then, the roller coaster goes ____, down, down! The potential energy changes to *kinetic energy*. Kinetic energy is the energy of moving. The ____ it goes, the more kinetic energy it has. That is why you feel like you are going super fast! The roller coaster goes around ____ and curves. Sometimes you feel like you are going to ____ out of your seat! That is because of something called *G-force*. G-force is how strong gravity is ____ on you. It makes you feel heavy or ____.

Roller Coasters

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