13 POINTS!! What is the relationship between temperature and density? Explain how this
makes a hot air balloon fly and connect the design of your balloon to thermal
expansion. This is a 5 sentence paragraph!!

As temperature increases, density decreases. This is because the particles have more energy, and spread out, which causes the density to decrease. When the particles spread out, it can also lead to the object changing states. The same effect is seen when the temperature decreases. The particles slow down, have less energy, and go closer together. When the particles come together, it can also lead to an object changing states.

As temperature increases, density decreases. This allows a hot air balloon to fly because the air in the balloon is heated which makes the air in the balloon less dense then the air around the balloon. Less dense air goes up and denser air goes down so this is why the balloon fly. The design of the balloon is related to thermal energy because as the temperature rises the balloon expands.