This experiment is kind of like doing laundry! We will find out how long it takes for water to evaporate from cloth, by weighing the cloth when it is wet, and then as time goes past, weigh it several times more.

It would be best to weigh it on an arm balance scale, if one is available for our use.

It would be best to measure the amount of water we will put onto the cloth, and note the time that we wet the cloth. Make a note of the kind of day it is, also. (If it is a
rainy day, there will be moisture in the air, and the cloth won't dry as fast as it would on a dry or windy day.)

Why on earth would we weigh something to see how fast it dries? Water has weight. As it evaporates, the object that is wet will lose weight.

If you measure 1/4 cup of water, then weigh it, weigh the cloth before it is wet and then, weigh it after it is wet, you can learn how fast water evaporates in two ways: by weight and by volume.

As the water evaporates, the end of the scale with the cloth on it will rise, because it becomes lighter as it dries.

Weigh it every half-hour until it is dry.

Make a graph which shows the rate at which the water evaporates from the cloth.

This experiment can be varied by having all other elements the same, but use a fan, or, if the heater is on in the room, place the wet cloth close to (abut not touching) the heat (being careful, of course, not to cause a fire).

Your graph can then show the conditions under which the evaporate faster.