DENSITY

1. water, 1 g/cm^3

1.1. density of other materials, floating and sinking

1.1.1. people swimming, exhaling, inhaling, changing the body's density, density of the body, the dead sea, denisty of saltwater vs. freshwater

1.1.2. density of mercury, floating and sinking in mercury

1.1.3. buoyancy, link to forces and Newton's laws of motion

1.1.4. aerogel

1.2. water changes density when it freezes

1.2.1. burst water pipes

1.3. measuring the density of a liquid

2. density of gases

2.1. hot air balloons, helium balloons, weather, floating and sinking in gas

2.2. freezers, what is the best design?

2.3. CO2 fire extinguisher

3. density of the nucleus in an atom

3.1. size of atoms, powers of ten

3.2. neutron stars

4. ⍴ = m/V

4.1. is air heavier than copper? what do we mean exactly? need to choose our words wisely and be accurate about the terminology

4.2. mathematics formula, rearranging an equation, direct proportionality

4.3. Greek letters in science and mathematics

4.4. volume, different units mL, cm^3, etc. powers of ten

4.4.1. measuring volume

4.4.1.1. finding the volume of irregular shaped objects (the legend of Archimedes

4.4.1.1.1. uncertainty, knowing what is true in science!

4.4.2. measuring mass

4.4.3. measuring density

5. knowing the density of the planets allows us to say something about their core

5.1. most and least dense materials in the universe

6. real-world applications

6.1. bone density

6.2. separation of blood