C14 The Earth's Resources

Question 1

1. What are the 4 things that humans use the Earth’s resources to provide?

Answer 1

1. Warmth, shelter, food and transport

Question 2

2. What is a finite resource? Give examples.

Answer 2

2. One that we cannot replaced as quickly as we use it e.g. coal, iron ore

Question 3

3. What is a sustainable resource?

Answer 3

3. One that we can replace as quickly as we use it e.g. wood

Question 4

4. What must water have only low levels of to make it safe to drink?

Answer 4

4. Dissolved salts and bacteria

Question 5

5. What is the name given to water that is safe to drink?

Answer 5

5. Potable water

Question 6

6. What is the difference between pure and potable water?

Answer 6

6. Potable water is not ‘pure’ it contains some dissolved solids

Question 7

7. Where does most of our drinking water come from?

Answer 7

7. Rivers, reservoirs, boreholes

Question 8

8. What are the 2 main stages of the process that we use to make our water safe to drink?

Answer 8

8. Filtration – remove solids

Sterilisation (using chlorine, ozone, UV light) – to kill bacteria

Question 9

9. To get water from sea water what two processes can be used?

Answer 9

9. Desalination can either be done by – distillation or reverse osmosis

Question 10

10. What are the disadvantages of these techniques?

Answer 10

10. Need a lot of energy so expensive

Question 11

11. What is sewage?

Answer 11

11. Water from homes and washed off roads

Question 12

12. What is in agricultural waste water?

Answer 12

12. Water from farms (can include animal waste and fertilisters)

Question 13

13. What are the main things that need to be removed from sewage and agricultural waste water?

Answer 13

13. Organic matter (faeces, leaves, paper) and harmful bacteria

Question 14

14. What is the main thing that needs to be removed from industrial waste water?

Answer 14

14. Harmful chemicals

Question 15

15. In sewage treatment what is used to break down the human waste and plant material?

Answer 15

15. microorganisms

Question 16

16. What 4 things need to be included in a life-cycle assessment?

Answer 16

16. use of fresh water, resources, energy sources and waste production

Question 17

17. What are the 5 stages in the lifetime of a product?

Answer 17

17. extracting and processing raw materials (the stuff the thing is made from)
    manufacturing and packaging
    use and operation during its lifetime
    disposal (e.g. burning, landfill or recycling)
    transport at each stage