1. DENSITY-
NOTES ON DENSITY

2. I Density(D) An object’s mass compared to its volume
On Earth we can sometimes use weight for mass.

3. IV Density Facts Things with HIGH Density: Bowling Ball Shot put
Big Marble
Things with LOW Density: Soccer Ball Soft Ball
Ping Pong Ball

4. I Density(D) Terms
Mass = how many atoms is in an object (kind of like weight)
Volume = how much room (space) an object occupies.
Matter = anything has mass and volume.

5. I Density(D) Terms Mass = grams (or kilograms)
Volume = milliliters (ml) or cubic centimeters (cc or cm3) , liters (L)

6. II Density Definition(def)
Density = how much stuff (matter) is in an object’s volume.
Density = mass divided by volume
D = M (mass) D = V M V (volume)

7. II Density Definition(def)M D V x

8. III Measuring Density MASS-use a balance scale Volume-
Calculate volume: (L x W x H) length x width x height
Volume- Example: cm x 5 cm x 2 cm =
100cm3

9. III Measuring Density MASS-use a balance scale Volume-
Displacement: put object in a graduated cylinder and see how much the water level rises.

10. III more-Measuring Density
15 ml add marble ml
What is the difference? This is the volume of the marble.
20 ml
15 ml

11. IV more- Density Facts Pure water (H2O) has a density of 1.0 g/cm3
That means: 1 gram of H2O has a volume of 1 cm3
1 cm3 = 1 ml = 1 g of H2O

12. Why do things float?

13. Why do things float?

14. Why do things float?
Mass = 42,116,363 Kg

15. Why do things float? Mass = 42,116,363 Kg Volume = 44,070,909 L
It is bigger than it is heavy
So it will float

16. Hey…what’s all that stuff floating out there…it must have a low density…let’s not worry about it.?

17. Ouch!

18. Yikes! Mass = 42,999,363 Kg Volume = 44,070,909 L
Yikes…the mass is increasing due to water inflow
But the volume is staying the same!
D =42.9 / 44.0 =.97

19. Yikes! Mass = 43,256,363 Kg Volume = 44,070,909 L
Yikes…the mass is increasing due to water inflow
But the volume is staying the same!
D =43.2 / 44.0 =.98

20. Yikes! Mass = 43,943,363 Kg Volume = 44,070,909 L
Yikes…the mass is increasing due to water inflow
But the volume is staying the same!
D =43.9 / 44.0 =.99

21. Yikes! Mass = 44,060,363 Kg Volume = 44,070,909 L
Yikes…the mass is increasing due to water inflow
But the volume is staying the same!
D =44.0 / 44.0 =1.0

22. Things float if their density is less than the density of H20
Why do things float?
Things float if their density is less than the density of H20

23. Things sink if their density is larger than the density of H20
Why do things sink?
Things sink if their density is larger than the density of H20

24. Why do things float?
Tonnage (gross): tons Displacement at time of collision: 48,478 tons (figures vary)
Mass = 42,116,363 Kg
Volume (displacement) = 44,070,909 L
Density = M/V = 42,116,363 Kg / 44,070,909 L = 0.96 Kg/L

25. Why do things float?

26. A thing will float if its mass is smaller than its volume.
Why do things float
A thing will float if its mass is smaller than its volume.
A thing will sink if its mass is bigger than its volume

27. Metric Prefix’s Giga x 1,000,000,000 (billion)
Mega x 1,000,000 (million)
Kilo x Hecto x100
Deka x10
Meter, Liter, Gram
Deci 1/10
Centi 1/ Milli 1/1000
Micro 1/1,000,000