1. Chapter 2
Lesson 2: Water Density
5th Grade Science

2. What is Matter? Matter Mass Volume Weight
Anything that has mass and volume
Mass
The amount of matter in an object
Volume
The amount of space taken up by an object
Weight
How strongly gravity pulls on an object

3. Weight can change, Mass stays the same

4. Density = Mass (g) Volume (cm3)
What is Density
Density
The amount of mass in a given amount of space
1 cubic centimeter(cm3) = 1 milliliter(ml)
Density = Mass (g) Volume (cm3)

5. End Questions
What is the density of an object with a mass of 100g and a volume of 25cm3?
What is the Density of a rock if its Mass is 75g and its density is 5g/ml?
What is the volume of an object that has a mass of 12g and a density of 4g/cm3?

6. Activity Question – Hypothesis – Supplies – Procedure – Conclusion –
Mass
(g)
Volume
(ml)
Density
(g/ml)
Ping Pong Ball
Golf Ball
Tennis Ball
Styrofoam Ball
Marble
Activity
Question –
Hypothesis –
Supplies –
Procedure –
Conclusion –
Density = Mass (g) Volume (ml)

7. End Questions
What is the density of an object with a mass of 56g and a volume of 7cm3?
What is the density of a rock if its Mass is 100g and its volume is 10g/ml?
What is the volume of an object that has a mass of 16g and a density of 8g/cm3?

8. Demonstration Question – Hypothesis – Supplies – Procedure –
Mass
(g)
Volume
(ml)
Density
(g/ml)
Syrup
Vegetable Oil
Water
Rubbing Alcohol
Demonstration
Question –
Hypothesis –
Supplies –
Procedure –
Conclusion –
Density = Mass (g) Volume (ml)

9. Warm Water vs Cold Thermal Expansion
Objects take up more volume when they get warmer
Warm water becomes less dense than cold
Water is special. It expands when it gets colder.
The mass of the water doesn’t change