Experiment

Is wood more absorbent than plastic?

Take a block of wood. Record its weight and measurement. Find something made of plastic that weighs the same, and take its weight and measurement. Soak both for one week in a bowl of water. Make sure they are both covered by the water – do not let them float! After one week remove them from the water. Weigh them. Record the measurements. What do you notice? Is there a difference after one week?