1. Cooking oil has a mass of 22.75 g and a volume of 25 mL . What is its density ? Show your work . 2.A piece of lead has a mass of 170 g and a volume of 15 cm^3 What is its density? Show your work.

3. A helium balloon has a mass of 0.036 g and a density of 0.00018 g/cm^ 3 What is the volume ? Show your work

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water