Things you will need to know for this lab:

Volumes of objects can be found by putting them in water,
then watching how much the water is "displaced".

Volume of any object =
(Volume of water after object is added) - (Volume of water before object is added)

Masses can be found using the small balance scale.
Just record the total mass of the weights needed to balance the object.

HOWEVER, to find the mass of the bigger objects you'll need to use the bathroom scale.

In that case, find your weight with the object, then subtract your weight without the object. This will give you the *weight* of the object in pounds. To convert to the *mass* in grams, multiply the value by 454. In other words:

Mass of object = [(Your weight w/object) - (Your weight w/o object)] x 454 grams