Choose a surface-protection idea

Supplied materials

• For younger learners, an adult may read each direction aloud; pointing, drawing and spoken explanations count as responses.
• Paper, drawing space or a browser document.
• Reference card A: roots and cover can help retain soil. Reference card B: guides the supplied flowing water.
• Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Need to reduce loose soil loss.
• Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Need to route roof runoff in model.
• Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Need to stop sand crossing a paper boundary.
• Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Need to see whether a revised model helps.
• Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Roots can help hold soil.
• Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: Changed design has no test record.

Learn the idea

A solution should address the process causing damage. These paper proposals are simplified models. Real flooding or slope hazards require qualified local advice.

Plant cover means roots and cover can help retain soil. Channel means guides the supplied flowing water. Barrier means blocks the specified sediment path. Observe again means collects evidence after a change.

For plant cover, look for the clue “roots and cover can help retain soil.” For channel, look for “guides the supplied flowing water.” More than one process can happen in a real situation. Answer about the one described in this question.

1. Read or listen to the four science words and what each means. Say how the first two differ.
2. Choose two of the short cases. Point to the clue that helps you choose a science word for each one. You may draw or say your answer.
3. Answer each practice question. Say which clue helped you, then check the explanation.
4. Use the extra task to make two examples that show different science words. Draw or say what makes each one fit.

Check your reasoning

Your answer is temporary and is not saved to an account. Download your current answer before leaving or reloading. Written work on paper or in another app stays in your own file.

Take it further

Create one new case showing plant cover and one showing channel. Expected: the first explicitly shows “roots and cover can help retain soil”; the second explicitly shows “guides the supplied flowing water.” Explain the distinction by drawing, speaking or writing. A label without a matching feature is incomplete.

Nothing here is saved to an account or sent to a teacher. The answer download includes your current choice and any checked feedback. It does not include choices from the separate More practice section. Download that section separately.