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