Standard Units of Measurement
What standard unit is used to measure mass?
Grams (g) or kilograms (kg).
What is mass?
The amount of matter in an object.
What unit is used to measure the volume of a liquid?
Millilitres (mL) or litres (L)
What is volume?
The amount of space an object takes up.
What tool and unit would you use to measure the length of a pencil?
A ruler; centimetres (cm).
What is density?
How much mass is packed into a certain volume (mass ÷ volume).
If you want to measure how much space a box takes up, what measurement would you use?
Volume, measured in cubic centimetres (cm³) or litres (L)
Which object is more dense: one that sinks or one that floats?
The one that sinks—it has a higher density.
Explain the difference between mass and volume.
Mass is how much matter an object has; volume is how much space it takes up.
Explain how two objects can have the same volume but different densities.
They can take up the same amount of space but have different masses (one has more matter packed inside).