Grade 9 Environmental science practice

What is on the worksheet

1. Uniform rainfall of 77 mm falls on 20 hectares. In a simplified model, 0.1 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

2. Uniform rainfall of 126 mm falls on 52 hectares. In a simplified model, 0.8 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

3. Uniform rainfall of 73 mm falls on 41 hectares. In a simplified model, 0.8 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

4. Uniform rainfall of 27 mm falls on 35 hectares. In a simplified model, 0.9 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

5. Uniform rainfall of 98 mm falls on 47 hectares. In a simplified model, 0.8 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

6. Uniform rainfall of 137 mm falls on 41 hectares. In a simplified model, 0.1 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

7. Uniform rainfall of 75 mm falls on 27 hectares. In a simplified model, 0.2 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

8. A model reduces waste from 50 to 35 kg. What is the reduction in kilograms?

9. Uniform rainfall of 114 mm falls on 36 hectares. In a simplified model, 0.2 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

10. Why can a reusable item need several uses before a particular impact becomes lower than a disposable alternative?

11. Uniform rainfall of 37 mm falls on 24 hectares. In a simplified model, 0.7 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

12. Uniform rainfall of 22 mm falls on 16 hectares. In a simplified model, 0.8 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

13. Uniform rainfall of 29 mm falls on 5 hectares. In a simplified model, 0.5 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

14. Uniform rainfall of 95 mm falls on 48 hectares. In a simplified model, 0.6 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

15. Uniform rainfall of 41 mm falls on 59 hectares. In a simplified model, 0.1 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

16. Uniform rainfall of 30 mm falls on 31 hectares. In a simplified model, 0.4 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

17. Uniform rainfall of 20 mm falls on 32 hectares. In a simplified model, 0.3 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

18. Uniform rainfall of 93 mm falls on 14 hectares. In a simplified model, 0.9 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

19. Uniform rainfall of 49 mm falls on 34 hectares. In a simplified model, 0.6 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.

20. Uniform rainfall of 144 mm falls on 3 hectares. In a simplified model, 0.9 of the rain becomes runoff. Find runoff volume in m³. Round the final result to 4 decimal places if needed. Answer in m³.