The amount of matter that fits in a given space.

If you pour liquids together that do not mix, they have different densities.

Therefore, they will form liquid layers.

The liquid with the

LARGEST

density will sink to the

BOTTOM

.

The liquid with the

SMALLEST

density will float on the

TOP

.

So how do you find density?

1. Determine the

mass

of an object or substance.

2. Find or calculate the

volume

of an object or substance.

3. Know the

abbreviations

:

D= Density M = m=Mass V= Volume

4. Write the

formula

:

Mass/Volume = Density

5.

Plug

in the numbers

6. Attach the

units

for density (mass/volume)

Liquids: grams per milliliters (g/ml)

Solids: grams per cubic centimeter (g/cm3)

Answers to Do Now:

What is mass?

The amount of matter in an object.

What is weight?

A measurement of the gravitational force of attraction of the earth acting on an object.

What is volume?

The amount of space occupied by a solid, liquid, or gas.

Mass vs. Weight

The mass of an object never changes, the weight will change depending how strong gravity’s force is in a given location.

How do you find volume?

Regular shapes:

Irregular shapes:

Liquids:

What are your units for volume?

Regular Shaped Solids: cm3

Irregular Shaped Solids: ml to cm3

Liquids: mL or L

Provide an example when your weight would change.

Read the information below and construct a scientific argument about the data below. What do you notice?

Construct a scientific argument on if a regular can of Coca-Cola and/or a diet can of Coca-Cola will float in water.

Regular Coca-Cola:

Mass: 394 g

Volume: 355 mL

Diet Coca-Cola:

Mass: 355.1 g

Volume: 355 mL

Practice Problems

You have a rock with a volume of 15cm3 and a mass of 45 g. What is its density?

You have a different rock with a volume of 30cm3 and a mass of 60g. What is its density?

**Density**

Do Now: Define Mass, Weight, and Volume

Discuss: How is mass and weight different?

L X W X H

Water displacement

Graduated Cylinder