Which is the cheapest experiment for science exhibition?

Answer 1

Is this for a school project? I recommend doing an experiment to see 'which substance melts ice the fastest'. All you need are ice cubes, sugar, salt, sand, pepper, and any other substance you want to test on it.

Weigh each ice cube first. Try to get them all to have the same weight, or as close as possible. Record their weights and number each cube. Also, record the air temperature at the time you're doing this.

Add a different substance onto each ice cube (the same amount for each) and leave one ice cube without a substance. Then time how long it takes for each ice cube to melt completely. From this you can see which substance speeds up melting the most, and if any slow melting down.

This is a great experiment to do as it has real-life uses - for example, substances which melt ice quickly can be used on roads in winter to melt the ice and avoid car accidents. This experiment finds the best substance to do this.