Year 10 Science · Unit 2 · Lesson 1

Introduction to Chemical Reactions

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.

Melting ice is a chemical change because the ice becomes water, which is a completely different substance.

Correct it:

T
F

In a chemical reaction, new substances with different properties are always formed.

Correct it:

T
F

Rusting of iron is a physical change because the iron is still there, just a different colour.

Correct it:

T
F

Colour change, gas production, and temperature change are all signs that a chemical reaction may have occurred.

Correct it:

T
F

Your Turn

Sort it!

Write each observation from the pool into the correct category box. Each observation belongs to one category only.

Iron nail turns orange-brown and flaky Ice cube melts on a hot day Baking soda and vinegar fizz vigorously Glass shatters when dropped Log burns in a campfire, producing smoke and ash Salt dissolves in water Milk left out sours and smells different Paper is torn in half Egg white turns white and firm when cooked Copper roof on the Sydney Opera House turns green

Chemical Change

Physical Change

Show What You Know

1. A student burns magnesium ribbon in the air. The shiny silver ribbon becomes a white powdery solid. Name two signs from this observation that indicate a chemical reaction has occurred.

Recall 2 marks

2. Explain the difference between a reactant and a product. Use an example of a chemical reaction from everyday Australian life in your answer.

Recall 2 marks

Wrap Up

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

HSCScience · Year 10 Science · Unit 2 · Lesson 1 · Foundation Worksheet