How is the human body structured to carry on the necessary functions of life? (3.L.1)

How do the functions of the skeletal and muscular systems compare? (3.L.1.1)

Why is skin necessary for the human body? (3.L.1.2)

What information about the properties of matter can be gathered by observation before and after a change? (3.P.2)

How do the properties of solids, liquids, and gases compare? (3.P.2.2)

Considering air is a mixture of gases, how does it compare to solids and liquids? (3.P.2.1)