Year 8 Science · Unit 3 · Lesson 14
Foundation Worksheet
Learning Goals
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.
Weathering is always a chemical change — water and wind slowly break down rocks by forming new chemical substances.
Correct it:
Cement production involves a chemical change that releases carbon dioxide gas into the atmosphere.
Correct it:
The carbon cycle only involves living things — plants and animals — moving carbon through the environment.
Correct it:
Acid rain can dissolve limestone through a chemical change because the acid reacts with calcium carbonate to form new soluble products.
Correct it:
Odd one out
Circle the item that does not belong in each group. Then explain why it doesn't fit.
| # | Group | Your answer (odd one + reason) |
|---|---|---|
| 1 | Photosynthesis Freeze-thaw weathering Combustion Decomposition | |
| 2 | Steel manufacturing Cement production Acid rain dissolving limestone Water treatment with chlorine | |
| 3 | Oxidation of iron Abrasion of sandstone Carbon dioxide dissolving in ocean water Reaction of SO₂ with water to form acid rain |
1. Describe the difference between physical weathering and chemical weathering. Give one Australian example of each type.
2. Name two processes in the carbon cycle and classify each as a physical or chemical change. Explain your classification for one of them.
Wrap Up
In one sentence, what was the main idea of this lesson?