1. Mass, Volume & Density

2. Matter All objects are made of matter.
Matter is anything that has mass and takes up space!
Matter is made of particles called atoms which are too small to see.
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3. Not Everything is Matter
Light and sound are not matter
Light does not take up space or have mass in the way a table does
Air is made up of atoms, but a sound traveling through air is not made of atoms
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4. Mass Mass is a measure of how much matter an object contains
Standard unit of mass is the kilogram (kg)
Smaller masses are usually measured in grams (g)
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5. Weight Weight is the downward pull of an object due to gravity
Weight is measured using a scale, such as a spring scale
Standard unit for weight is the newton (N)
Common unit for weight is the pound (lb)
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6. Volume Volume is a measure of the space matter occupies
Matter takes up space, therefore, matter has volume
Matter can be measured by displacement or using the volume formula
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7. Volume of Well-defined Shapes
Volume = length •width •height
Volume is measured in cubic units
All measurements must be in the same unit to calculate the volume using the formula
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8. Finding the Volume
Find the volume of a pizza box that is 8 cm high, 38 cm wide, and 38 cm long.
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9. Using the Formula
A bar of gold is 10 cm long, 5 cm wide, and 7 cm high. What is its volume?
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10. One More Try!
What is the volume of a large block of wood that is 50 cm long, 0.5 cm high, and 30 cm wide?
Remember, you have to have a unit of measure in your answer!

11. Volume by Displacement
Irregularly shaped objects’ volume can be measured by water displacement using a graduated cylinder
First, add water to the graduated cylinder and note its volume
Next, submerge the irregularly shaped object and note the new volume with the object
Subtract the initial volume from the volume with the object included to find the volume of the object
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12. Volume by Displacement
Volume by displacement is measured in milliliters (mL)
1 milliliter is equal to 1 cubic centimeter
1 mL = 1 cc or 1cm3
Be sure to read the volume of the liquid at the bottom of the curve, which is called the meniscus.
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13. Volume by Displacement
What is the volume of the object? – Solve in notes

14. Another One!
What is the volume of the object shown? – Solve in notes

15. Last One!
What is the volume of the object depicted below?

16. Density
Density – is a measure of the amount of matter present (mass) in a given volume of a substance
To calculate the density of an object, you divide the mass of the object by its volume
D = m/v
Standard unit of measure for density is g/cm3 or g/mL
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17. Calculating Density
Use the formula: d = m/v to find the density of a marble whose volume is 5 cm3 and a mass of 13 grams. – Complete problem in notes

18. Your Turn!
A lead sinker has a mass of 227 grams and a volume of 20 cm3 . What is the density of the lead sinker?
(Complete problem in notes)

19. Another One!
A glass of milk has a volume of 100 mL. If the milk has a mass of 103 grams, what is the density of milk? – Complete problem in notes