Ch 04.2: Matter, Mass, Volume, and Density

Ch 04.2: Matter, Mass,
Volume, & Density

​At the end of this lesson, you will be able to:

1. Define matter.

2. State what mass measures.

3. State what volume measures.

4. Define density.

5. Demonstrate how to calculate density.

Categorize

Options (8)

pencil

squirrel

apple

light

energy

shadow

sound

book

Which of the following would be an example of matter?

matter

not matter

Let's discuss:
What two characteristics does matter have to possess?

matter

- anything that has mass and volume (takes up space)

mass

- measure of the amount of matter in a substance or an object
- SI unit is the kilogram (kg), but is commonly measured using grams (g)
- measured with a triple-beam balance

Math Response

What is the mass shown here, to the nearest tenth?

Type answer here

Correct Answer: 190.3

Deg^°

Rad

Math Response

What is the mass shown here, to the nearest tenth?

Type answer here

Correct Answer: 37.3

Deg^°

Rad

Math Response

What is the mass shown here, to the nearest tenth?

Type answer here

Correct Answer: 105.6

Deg^°

Rad

Poll

Are mass and weight the same?

• yes

• no

- measures the force of gravity acting on an object
- measured in pounds (lb)
- varies dependent on the force of gravity

Weight

- measures the amount of matter in an object
- measured in kg or g
- is a constant

Mass

Mass and Weight are similar, but are NOT the same!

volume

- measure of the amount of space that a substance or an object takes up
- SI unit for the volume of a solid is the cubic meter (m3) or cubic centimeter (cm3)
- SI unit for the volume of a liquid is the liter (L) or milliliter (mL)

How do you measure the volume of a gas?

- depends on the volume of its container
- gases expand to fill whatever space is available to them

How do you measure the volume of a liquid?

- with a graduated cylinder

How do you measure the volume of a regular solid?

multiply: length x width x height

Math Response

What is the volume shown here?

Type answer here

Correct Answer: 144

Deg^°

Rad

Math Response

What is the volume shown here?

Type answer here

Correct Answer: 180

Deg^°

Rad

How do you measure the volume of an irregularly-shaped solid?

displacement method
(You learned this in Chapters 02/03.)

Math Response

What is the volume shown here?

Type answer here

Correct Answer: 2

Deg^°

Rad

Math Response

What is the volume shown here?

Type answer here

Correct Answer: 1.6

Deg^°

Rad

Let's discuss:
How are mass and volume related to each other?

density

- how closely packed the particles of matter are
- calculated by dividing mass by volume
D = m / V
- usually measured in g/cm3 or g/mL

Math Response

Calculate the density of a cork that has a mass of 3 grams and a volume of 16 cm3. Round to the nearest tenth.

Type answer here

Correct Answer: 0.2

Deg^°

Rad

Math Response

Calculate the density of a block of aluminum that occupies a volume of 15.0 cm3 and has a mass of 40.5 g. Round to the nearest tenth.

Type answer here

Correct Answer: 2.7

Deg^°

Rad

Multiple Select

Which of the following are an example of a physical property?

• mass

• weight

• volume

• density

All of them!

​Additional examples of physical properties include:
- mass
- weight
- volume
- density