Physical science can provide visual demonstrations to teach children about science and inspire them to research it further. Slowly pour one liquid on top of another with a different color that has a different density of the first. This will show how density can affect the ability of liquids to combine. Static electricity can be demonstrated by rubbing a balloon on your hair and sticking it on the wall. These two tricks can introduce children to the concepts within the study of physical science.
Show how objects can change their state of matter through physical science experiments and temperature. Take a cup of water and freeze it, demonstrating how a liquid can become a solid. Take that ice and heat it on a stove, watch as it returns to a liquid state of water, and then into a third state as it appears to disappear. The water is not actually disappearing, but instead turning into a gas state, known as water vapor through the process of evaporation.
Study the concept of friction by creating pinewood derby race cars and race them down different surfaces on a race track. Use the same angle for the track each time, but change the surface for the bottom 10 feet of the race track. For the first race, use plain wood. On the second race, coat the last ten feet of the wood with sand paper. Record the time for each race down the track, noting that the only thing that changed was the surface. Change it once again, using a sample piece of a rug to cover the track's final ten feet. Discuss how the surfaces at the end change the time for the car, based on friction between the car's wheels and the different surfaces.
Discover how white light from an object such as the sun is actually composed of many different colors by using a prism to refract, which is bending, the rays from the sun. Refract the light of the sun onto a white paper and ask the children to mark the divisions between each color and label the colors. Discuss how the wavelengths of the different colors effect the amount of that color in the rainbow.