1. KTM Temperature Density % Submerged
PhySci1
KTM
Temperature
Density
% Submerged

2. BURN SUGAR (ring-stand) OR MELT CHOCOLATE
Ask students why they smell what they do?

3. Kinetic Theory of Matter
All matter is made up of atoms and molecules that act like tiny particles. These tiny particles are always in motion.
Define matter and mass here

4. Measurements indicate that the average speed of oxygen molecules in 20°C air is an amazing 1700km/h. At this speed, the odor from a hot cheese pizza in Washington, D.C., should reach Mexico city in about 115 minutes.
Why don’t we smell food from Mexico?

5. How hot or cold something is (Colloquial definition)
Bulb Thermometer
Temperature
How hot or cold something is (Colloquial definition)
The average speed (kinetic energy) of the particles in a substance. (Scientific)
↑ Speed = ↑ Temperature
↓ Speed = ↓ Temperature
Rub your hands together

6. What Happens if I add a drop of food coloring to a glass of hot and cold water?
Do this experiment.
Hot Water
Cold Water

7. What Happens if I put a balloon over an Erlenmeyer Flask and put it on a hot plate/burner? Why?
Do this experiment. Put in cold water or let it cool so it deflates on its own.
Erlenmeyer Flask
Balloon

8. Density
Density is the amount of matter contained in an object in a given volume.
Density = mass of object / volume of object
Mass: grams
Volume: cm3
Density: g/cm3

9. Mass

10. Volume – if regularly shaped

11. Volume – irregularly shaped
Water Displacement

12. A Graduated Cylinder Measures Volume
1cm3 = 1ml

13. Which one has a higher density?
The brick and the sponge have a similar volume meaning they take up roughly the same amount of space but the brick will be much heavier than the sponge.
Since the brick has more mass it has a higher density.

14. Density of Common Objects
Water = 1g/cm3
Gold = 19.3g/cm3
Concrete = 2.7g/cm3
Iron = 7.8g/cm3
Ice = 0.92g/cm3
Air = g/cm3
If an object is denser than water (or another liquid) it will sink.
If an object is less dense than water (or another liquid) it will float.

15. Density Column 7 Layer Density Column Object Density g/cm3 Honey 1.42
Light Corn Syrup
1.33
Dawn Dish Soap
1.06
Water
1.00
Vegetable Oil
.92
Baby Oil
.83
Rubbing Alcohol
0.79

16. Density Formula Manipulation

17. Density Problems
If a 10.0cm3 block of ice has a mass of 9.17g, what is the density of ice?
A piece of tin has a mass of 16.52g and a volume of 2.26cm3. What is the density of tin?
A piece of metal has a density of 11.3 g/cm3 and a volume of 6.7 cm3. What is the mass of this piece of metal?
A cube 6cm by 5cm by 3cm has a mass of 450g. Calculate its density.

18. Handoutsx3 Density Lab Density Column Worksheet Density problems.
Water ml  g  cm3 experiment

19. Salt Water vs Fresh Water
Egg Demo:
Which one is denser?
Which one is it easier to swim in?

20. Density Question
If I have a wooden block that has a mass of 20g and a volume of 26cm3. What is its density? What happens to the density of that block of wood if you cut it in half?
Density Review question

21. WOOD BLOCK TWO WOOD BLOCKS Mass = 20g Volume 26cm3 Mass = 10g
Cut in half
Density = 0.77g/cm3
Density = 0.77g/cm3
Density = 0.77g/cm3
Should be review….
WOOD
BLOCK
What Happens if I cut one of the small wooden blocks in half again?
Mass = ???
Volume = ???
Density = ???
WOOD
BLOCK

22. Density does NOT depend on the amount of the substance you have.
Regardless of whether you have a small piece of gold or a giant truck full of it, the density of gold will be 19.3g/cm3

23. It is important to remember that for h20
Volume Displacement
It is important to remember that for h20
1g = 1ml = 1cm3
1000kg = 1000L = 1m3
H20 = 1g/cm3 or 1000kg/m3

24. How much of an Object will Float above Water?

25. Iceberg!!!! What percentage of an iceberg is hidden beneath the water?
Density of water is 1g/cm3
Density of Ice is 0.92g/cm3
So 0.92g/cm3 / 1g/cm3 = 0.92 x100 = 92%

26. Just the Tip of the Iceberg!!!

28. Knock on Wood
A branch from a tree extending out over a river snaps and falls into the water. If it has an overall density of 0.7g/cm3, will it sink or float and if it floats how much of it will be visible?

29. Knock on Wood
A branch from a tree extending out over a river snaps and falls into the water. If it has an overall density of 0.7g/cm3, will it sink or float and if it floats how much of it will be visible?

30. Floating Basketball
A basketball has a mass = 624g and a volume of cm3. What percentage of a basketball will float above water?

31. Floating Basketball
A basketball has a mass = 624g and a volume of cm3. What percentage of a basketball will float above water?

32. A basketball has a mass = 624g and a volume of 7512. 1cm3
A basketball has a mass = 624g and a volume of cm3. What percentage of a basketball will float above water?
D = m/v = 624g/ cm3 = 0.831g/cm3
Dball / Dwater = 0.831g/cm3 / 1g/cm3 x 100 = 8.3%
91.7% of a basketball will float above water.

33. Rank each Objects Density from the Most Dense to the Least Dense

34. Flotation Lab