1. Volume, Mass, Density

2. Do Now
What is the difference between mass and weight?

3. Mass Mass is the amount of matter in an object
Measured in kilograms (kg, g)

4. Volume
Volume is the quantity of three-dimensional space occupied by a liquid, solid, or gas
Calculating the volume of a regular object by LxWxH
V=LxWxH
express volume include liters, cubic meters, gallons, milliliters, teaspoons and ounces

5. Calculating Volume Length x Width x Height Length 2 cm Width 3 cm
Height 4 cm
Length 20 cm
Width 5.7 cm
Height 9.5 cm
Length 6.2 cm
Width 5 cm
Height 6.8 cm
Length 20 cm
Width 11 cm
Height 5.5 cm
Length 10 cm
Width 5 cm
Height 10 cm
Units are cm^3
Length 6 cm
Width 8 cm
Height 9 cm

6. Volume
Volume changes according to the external conditions. As an example, volume of a sample of gas depends on the air pressure. Volume of a solid can be changed when it is melted.
Mass is the amount of matter an object contains, while volume is how much space it takes.
Unlike mass because mass cannot change

7. Measuring Volume of irregular Shapes
How do we measure the volume of an apple when it isn’t a square or rectangle?
Water!

8. Density
Two different materials may have the same volume but different mass
Wooden sphere and lead sphere
Vice Versa : Two materials may have the same mass but not the same volume
Kilogram of sand vs kilogram of feathers
The volumes differ because sand and feathers have different densities
Density: measure of the mass per unit volume  Density = mass divided by volume
Example
lead cube vs wooden cube
Same volume (size and shape) but different masses
The lead cube is heavier, it is made up of more matter, therefore it has a greater density. More dense.

9. Calculating Density
A small block of wood floats on the water. It has a mass of 200g and a volume of 250 cm^3. What is the density of the wood?
1. What information is given to you?
Mass of Block = 200g
Volume of Block = 400 cm^3

10. Calculating Density 2. Plan and solve
What are you trying to calculate?
Does is answer make sense?
The density of the block
-Yes! The density is lower than 1.0 g/cm^3 which makes sense because the wood floats in water
Density = Mass/Volume
Density = 200g/400 cm^3
Density = .50 g/cm^3

11. Calculating Density
A block of copper has a mass of 500g and a volume of 250 cm^3. What is the density of the copper block?
Formula  Density = Mass/Volume
500/250=Density
2 = Density
Will is block sink or float?

12. Density Tower