This document discusses density and how it determines whether an object will sink or float in water. It defines density as the ratio of an object's mass to its volume. An object will sink if its density is greater than that of water (1 g/mL) and float if less. Examples are provided to calculate density of different objects and determine if they would sink or float based on their densities.

1. Density

2. Bell ringer
Do you think the following objects will sink or float? Why?
1) Can of Coca-Cola
2) Can of diet Coca-Cola

4. Density is a relationship between the mass and volume of an object.
It is how much mass is packed into a certain volume.
𝐷𝑒𝑛𝑠𝑖𝑡𝑦 =
𝑀𝑎𝑠𝑠
𝑉𝑜𝑙𝑢𝑚𝑒

5. What determines if something will sink or
float in water?
• The density of water is 1 gram/milliliter.
• If an objects’ density is greater than 1 it will sink
• If an objects’ density is less than 1 it will float.

6. Determine the density of a cone with a mass of 16 grams and a volume
of 8 milliliters.

7. Determine the density of sphere with a radius of 2 cm and a mass of
120 grams.

8. Lucy stores her cat food in a cylindrical can that has a height of 6 inches,
a radius of 3 inches and a mass of 200 grams. She stores her fish food in
a cylindrical can that has a height of 3 inches, a radius of 1 inch, and a
mass of 6 grams. She accidentally drops both of them in the fish tank.
Determine the volume and density of these cylindrical cans to
determine if they will sink or float in the water.
Cat
Food Fish
Food