1. DENSITY
Density a measure of the concentration of matter (MASS) in a given space.
Example: a block of foam, block of wood, block concrete
All the same size but the weight is different.
The heavier object has molecules packed closer together.
A B C
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2. DENSITY
Density a measure of the concentration of matter (MASS) in a given space.
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A B C
B is greater than A – More molecules
C is greater than A – More mass/ more molecules
C has the Highest Density because it is a large mass in a small volume.
Density is defined as the mass per unit volume of a sample of matter 3
g/cm

3. Density Formula Mass D = Volume Volume = length X Width X height cm 3
How can we find out the volume of these aluminum bars?
Volume = length X Width X height cm 3

4. How can you find the volume of an irregular shaped object?
Water displacement method

5. Remember one cubic centimeter = 1 mL
IN THE  METRIC SYSTEM,
ONE CUBIC CENTIMETER OF WATER,  WEIGHS EXACTLY 1 GRAM.
AND THEREFORE , ONE LITER OF WATER,  WEIGHS 1000 GRAMS,
1,000 GRAMS IS ALSO CALLED A KILOGRAM,
BECAUSE, THE PREFIX KILO- MEANS 1,000 OF...
YOU SHOULD ALSO KNOW THAT,
 1 MILLILITER or 1 / 1000 OF A LITER OF WATER,
WEIGHS 1 GRAM

6. DENSITY and TEMPERATURE
Hot air Balloon:
What does this demo show?

8. Change in Temperature causes a change in volume, which affects density.
As the volume of a gas or liquid__________, and the mass remains the same, the density________
increases
decreases
As the volume of a gas or liquid decreases, and the mass remains the same, the density increases.
Change in temperature causes atmospheric and ocean currents

9. NATURE of WATER
Most materials are densest in the solid state. Water is most dense as a liquid when the temperature is 4ºC

10. What significance does this behavior of water have when a lake freezes?

11. Traditional Inuit (Eskimo) ice fishing near Pond Inlet, Baffin Island, Nunavut, Can.

12. DENSITY GRAPHS
density
mass
volume
size

13. DENSITY GRAPHS
density
pressure
Density
Temperature