1. Jar Full of Marbles

2. This beaker is filled with marbles. Can I fit anymore into this space?

3. Will this salt fit in the beaker ?

4. Now there is more stuff in here than before
Now there is more stuff in here than before. Can I add anything more to this space?

5. This is the same amount of space as when I started with just the marbles, but now there is a LOT more stuff in here.
Jar is filled with water. It has dissolved some of the sugar at the top of the beaker.

6. Scientists have a word to describe how much stuff is in a certain amount of space ~ density
density = stuff
space

7. These terms don’t seem “official.” In math, what is space called?
density = stuff
space

8. volume
density = stuff =
space volume

9. What do we call stuff in science?
density = stuff =
space volume

10. Matter which has mass
density = stuff = mass
space volume

11. density = mass
volume