10. Measurement

Lesson

Think about a feather and an elephant. Which one of those items do you think would be heavier?

This video introduces the units of grams, and kilograms and discusses the types of objects that would be measured by these units.

Which unit is best to measure the mass of this cup of flour?

A

Kilograms

B

Grams

Worked Solution

Idea summary

A gram has a mass similar to a piece of paper, or a feather. A kilogram has a mass similar to a 1 litre bottle of milk or juice.

The prefix can help with identifying the size of the units.

kilo - means "one thousand of", so a kilogram has 1000 grams.

This video looks at measuring the mass of objects using a scale.

The scale below shows an object balanced evenly with a particular set of weights.

The following weights were on the scale:

What is the total mass of the object?

Worked Solution

Idea summary

We can measure the mass of objects with different types of scales. Mechanical scales are just like a number line, but in a circle.