**Density**

Density - comparison of how much matter there is in a certain amount of space

Which object is more dense?

Which object is more dense?

What is density?

Density = mass

Volume

the units for density are:

g

ml

g

cm

3

or

Let's try a problem!

9g

3ml

= 3g/ml

Frank has a paper clip. It has a mass of 9g and a volume of 3ml. What is its density?

Solve:

3g

3ml

= 1g/ml

Frank also has an eraser. It has a mass of 3g and a volume of 3ml. What is its density?

Solve:

Try these problems with your partner

Jack has a rock. The rock has a mass of 6g and a volume of 3ml. What is the density of the rock?

Jill has a pen. The pen has a volume of 9ml and a density of 2g/ml. What is the mass of the pen?

Now try these problems on your own

Alicia has a watch. It has a volume of 2ml and a mass of 4g. What is the density of the watch?

Mia has a wallet. It has a mass of 15g and a density of 3g/ml. What is the volume of the wallet?

Buoyancy & Solubility

Buoyancy - power to float in a liquid

Water has a density of 1.0 g/ml

if an object has a density higher than 1.0g/ml, it will sink

if an object has a density lower than 1.0g/ml, it will float

Solubility - able to be dissolved

example: salt

**Properties of Matter**