Year 7 Science · Unit 2 · Lesson 3

Physical Properties

Foundation Worksheet

Name

Date

Class

Learning Goals

Recall the definitions of density, solubility and conductivity
Correct common misconceptions about why objects float or sink
Identify the odd one out in groups sorted by physical property type

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.

Gold sinks in water because it is a metal.

Correct it:

An object floats in water if its density is less than 1.0 g/cm³.

Correct it:

Sugar dissolves in water, so it has low solubility.

Correct it:

Metals are good electrical conductors, but most non-metals are insulators.

Correct it:

Measuring the colour of a substance changes it into a new substance.

Correct it:

Your Turn

Odd one out

Circle the item that does not belong in each group. Then explain why it doesn't fit — use a physical property name in your reason.

#	Group	Your answer (odd one + reason)
1	Copper Aluminium Iron Wood
2	Cork (0.24 g/cm³) Ice (0.92 g/cm³) Balsa wood (0.12 g/cm³) Aluminium (2.70 g/cm³)
3	Table sugar Table salt Beach sand Honey

Show What You Know

1. A battleship is made from steel (density about 7.8 g/cm³), yet it floats. Explain how this is possible, using the concept of density in your answer.

Recall 2 marks

2. Name TWO physical properties of copper that make it useful for electrical wiring. Explain why each property matters for this purpose.

Recall 2 marks

Wrap Up

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