Salt Science Fair Projects

Salt science fair projects can be classified as food experiments or they can be classified as chemistry experiments. If you are interested in exploring how salt is used to create chemical reaction or to add flavor to foods then try out one or more of the following complete science fair projects.

Salt prevents water from freezing. This hypothesis is based on the ability of salt to keep water from freezing. To test this hypothesis you will need to develop salt science fair projects. For example, you can create three different solutions. One will be plain water, one will have the salt concentration of sea water and one will have the salt concentration twice that of sea water. You will then place these containers in the freezer and let them set. You will check the containers after 30 minutes, 60 minutes, 90 minutes and 120 minutes. What did you notice?

Salt can be used to melt ice. This is one of the most commonly used salt science fair projects. To test this hypothesis all you have to do is to sprinkle salt on ice and watch what happens. How can you advance this project to make it more interesting? For example, find the answer to this hypothesis questions, "how much salt would be needed to melt a 150 tonne ice berg?

Salt can be used to repel water. This is an interesting hypothesis that you can test with salt water experiments science fair projects. One example projects is to apply watercolors to a sheet of paper. Then sprinkle the wet watercolor with salt. Notice what happens. Did the salt attract or repel the water? Explain your results.

Salt can be used as a natural herbicide. For centuries people have used salt to prevent vegetation from growing in a specific area. Test out this hypothesis in a controlled environment. Take a planter and fill it with topsoil. Apply two tablespoons of salt to the topsoil and mix it into the soil. Then plant seed and water. Do the seeds grow? Why or why not? If the salt does work as a natural herbicide, how long will it prevent vegetation from growing?

Salt can be used as a natural pesticide. To test this hypothesis you will need to find a way to apply it to your test plant. You can create a ring of salt around a plant to prevent slugs from attacking a plant. Try this out to see if it really work. If you spray a saline solution on to a plant, would it repel flying insects? Why or why not?