Year 7 Science · Unit 3 · Lesson 2

Gravity and Weight vs Mass

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

True or False? Fix the false ones

Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.

Weight and mass are the same thing — both measure how much matter is in an object.

Correct it:

T
F

You have no mass when you travel to space, because gravity disappears there.

Correct it:

T
F

Weight is measured in kilograms (kg) using a spring scale.

Correct it:

T
F

A 60 kg student on the Moon has less mass than the same student on Earth.

Correct it:

T
F

Gravity gets weaker as you move further from a planet — it does not simply stop at a fixed boundary.

Correct it:

T
F

Your Turn

Sort it!

Write each statement from the pool into the correct category box. Some statements may describe both — write those in the "Both" column.

Measured in kilograms (kg) Measured in Newtons (N) Amount of matter in an object A force caused by gravity Stays constant on the Moon and on Mars Changes depending on your location W = m × g is the formula Measured with a balance scale Affects how hard you press on bathroom scales Always the same for a given object, no matter where it is

Describes Mass

Describes Weight

Both

Show What You Know

1. A 70 kg Australian astronaut travels to Mars (g = 3.7 N/kg). Calculate their weight on Mars. Show your working using W = m × g.

Recall 2 marks

2. Explain why a bathroom scale on the Moon would show a much lower reading than it would for the same person on Earth — even though the person's mass hasn't changed.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 7 Science · Unit 3 · Lesson 2 · Foundation Worksheet