Density info

Density

weight measurement per space measurement

grams/cm³
kilograms/m³

​It is measured in:

How much something weighs compared to how much space it takes up

​Density is:

From last lesson

Multiple Choice

We tested 6 metals last lesson. Which was the MOST dense?

• Aluminium

• Copper

• Iron

• Lead

• Zinc

Officially:

Density is a measure of how much mass is contained in a given volume of a substance.

It is calculated using the formula:

Density = mass ÷ volume

Poll

Have you learned how to calculate volume of objects in maths?

• Yes, definitely

• Maybe, but I am not clear on it

• No

​Calculate volume of regular objects (cubes, rectangular prisms)
Calculate volume of irregular objects (using water)

​What you need for Science:

Draw

How do you feel about doing some maths in Science?

​Starting with: irregular objects

Fill in the Blanks

If the cylinder started with 100mL in it, what is the volume of the rock?

Calculations

​Because water is handy....

1mL of water = 1 centimetre cubed.
1mL of water = 1 gram

So when we are looking at volume of irregular objects, 25mL = 25 cm³

Math Response

If I start with a measuring cylinder that has 57mL of water in it, and I add an object that moves the water to 79mL, what is the volume of that object?

Type answer here

Correct Answer: 79-57=22

Deg^°

Rad