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# Density

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by

## Emily Holdsworth

on 14 March 2017

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#### Transcript of Density

Density
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)
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: Convert 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
Consider: How is mass and weight different?
L X W X H
Water displacement