Year 8 Science · Unit 2 · Lesson 3

Elements, Compounds and Mixtures

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

Sort it!

Write each substance from the pool into the correct category box. Use what you know, or your best guess, to get started.

oxygen gas (O₂) seawater carbon dioxide (CO₂) copper metal air water (H₂O) soil iron (Fe) salt (NaCl) granite

Element

Compound

Mixture

Your Turn

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.

A compound can be separated into its elements by filtration.

Correct it:

T
F

Air is a mixture because it contains nitrogen and oxygen that are not chemically bonded to each other.

Correct it:

T
F

In a compound, atoms of different elements are bonded in variable proportions.

Correct it:

T
F

Elements and compounds are both pure substances.

Correct it:

T
F

A particle diagram showing two different circles bonded together represents an element.

Correct it:

T
F

Show What You Know

1. State one difference between a compound and a mixture. Use the words "bonded" and "physically" in your answer.

Recall 2 marks

2. A particle diagram shows identical pairs of one large red circle bonded to two small blue circles. Is this substance an element, compound or mixture? Explain your reasoning.

Recall 2 marks

Wrap Up

In one sentence, what is the main difference between a compound and a mixture?

HSCScience · Year 8 Science · Unit 2 · Lesson 3 · Foundation Worksheet