Name: __________________________
Density Worksheet
From our exploration, here’s what we know so far:
Mass
Volume
Water
Brass
From our water and brass weight experiments, let’s try to visualize this. For example purposes, let’s
say that 1 atom weighs 1 gram (it doesn’t really, but it makes things easier). Place 1 dot (a dot
represents an atom) in each square until all squares are filled. Once the squares are all filled, you can
start over and place a 2nd dot in a square. Keep doing this until you use all of the dots.
Water
1. How many total dots are in water? ______
Brass
How many total dots in brass? _______
2. In which example are the dots (atoms) closer together?
______
3. In which example do the dots take up more space (more volume)? _______
4. Which example has more dots in a square?
______
5. Which choice below is a measure of how many atoms/molecules are in a substance (circle it)?
weight
mass
volume
6. Which choice below is a measure of how much space an object takes up (circle it)?
weight
mass
volume
7. One final question… Why does a 100 gram brass weight sink in water?
What is density? Simply put, it’s how many atoms are packed into a space. Since density shows how
many particles (mass) are in a certain amount of space (volume), we can come up with a math formula to
help calculate it. The formula for density is …
Density = mass / volume (mass divided by volume)
The unit for density is grams per cubic centimeter (g/cm3 is used for solids) or grams per milliliter (g/ml is
used for liquids).
Calculate the densities of the following objects. You will need a calculator. Round all answers to the
tenths place (1 place after the decimal).
8. A shoe box:
mass = 114.0 g
density = Mass
Volume
9. a rock:
mass = 22.3 g
density = Mass
Volume
10. a dry sponge:
=
=
mass = 54.2 g
density = Mass
Volume
=
11. a full soda bottle: mass = 609.0 g
density = Mass
Volume
=
volume = 538.5 cm3
=
____________ g/cm3
volume = 8.0 cm3
=
____________ g/cm3
volume = 78.1 cm3
=
____________ g/cm3
volume = 591.0 ml
=
____________ g/cm3
12. You drink all of the soda out of the bottle (from question #11). The empty soda bottle now weighs 39
grams but still has a volume of 591.0 ml. Why does the soda bottle still have the same volume but a
different weight?
13. Calculate the density of the empty soda bottle. *show your work just like we did in problems 8-11
14. Why did the density of the bottle of soda change?