1. Mass, Volume, and Understanding Density

2. What is the difference between mass and volume?
Mass: the amount of matter in an object
Can be measured directly in various units (kilograms, grams, milligrams, etc.
Can also be measured indirectly
Eg: mass of water = (mass of container + water) – mass of the container

3. What is the difference between mass and volume?
Volume: is measuring the amount of space that is occupied by matter
Eg: using a graduated cylinder to measure the volume of water
The mass of the water may be 30 g, but the volume is 20 ml.

4. Density Ever wonder why oil floats on top of water?
If you have 1 liter of oil and 1 liter of water, the oil has a lighter mass so it floats on the water.
When you are comparing masses and volumes, the scientific term for this is density

5. Density Density is calculated by this formula:
Density = mass The units are g/mL
volume
We compare all densities to the density of water, which is 1.0 g/mL
Substances with a density more than 1.0 g/ml SINK, while substances with a density less than 1.0 g/ml FLOAT

6. Brain Buster
What is the density of copper if it weighs 892 grams and has a volume of 100 milliliters?
What is the density of oil if it weighs 86 grams and has a volume of 100 milliliters?
Which substance has the higher density?
Which substance will float in water? Which one will sink?