1. Definition of Density
Density?

2. Covered in This Lesson
This lesson will define density as mass/volume and provide relevant real world examples of objects with varying densities
The density (D) of a pure substance is uniform throughout the sample, giving the same ratio of mass (m) to volume (V).
The formula is D = m/V

3. Real World Examples
Helium balloons; because helium gas has a density 0.179g/L while air has a density of about 1.25g/Lm helium balloons float.

4. Another Example Ice floats on water because water has a density of
about 1 g/mL and
ice has a density
of about 0.9 g/mL.

5. A Third Example
A kiwi can have a density of more than of water. An apple can have a density of less than water. That is why we bob for apples