Garbage in, garbage out Worksheet-3

Garbage in, garbage out Worksheet-3

Multiple-Choice Question:

21. Biotic environment includes:

(a) Consumers                                 (b) Decomposers

(c) Producers                                   (d) All of these

22. The following are all sources of pollution:

(i) Solid waste     (ii) Pesticides       (iii) Sewage         (iv) Fertilizers

Which of the following combinations contain sources of soil pollution?

(a) (ii) and (iv)                                  (b) (i), (ii), (iii) and (iv)

(c) (i), (ii) and (iii)                            (d) (ii), (iii) and(iv)

23. Which of the following are biodegradable waste products?

(a) glass, wood cuttings, batteries

(b) vegetable peels, garden waste, paper

(c) rubber, plastic, manure

(d) metal, glass, plastic

24. The main causes of water pollution are:

(a) oil spills, untreated sewage and chemical effluent

(b) untreated sewage, glass bottles and plastic bags

(c) pesticides, treated sewage and litter

(d) chemical effluent, leaching of pesticides and algae

25. Typhoid, cholera and dysentery are diseases that are spread by:

(a) the use of pesticides                  (b) land/soil pollution

(c) air pollution                                (d) water pollution

26. Non-biodegradable means:

(a) A substance that is thrown away as kitchen refuse

(b) A substance that will not dissolve in water

(c) A substance that cannot decompose naturally

(d) A substance that costs too much to recycle

27. Read the following graph.

(i)  By how much did the level of sulphur dioxide pollution in China decreased between 2005 and 2010?

(ii) Which country had the highest level of sulphur dioxide pollution in 2000?

(a) (i) 30  (ii) E                                  (b) (i) 23 (ii) B

(c) (i) 32 (ii) A                                   (d) (i) 29 (ii) C

28. A solution to reduce the air pollution may be:

(a) the use of public transport

(b) causing veld fires

(c) the use of leaded petrol

(d) the burning of wood and coal

29. One of the following is a positive human influence on the environment:

(a) Pollution                                     (b) Conservation

(c) Deforestation                             (d) Overpopulation

30. Biological control is useful because it:

(a) usually attacks all useful micro-organisms

(b) usually originates in the country where the alien plant destroys indigenous vegetation

(c) can destroy an alien plant infestation or reduce its population numbers

(d) usually attacks all plant species

Answer Key:

21. (d)
22. (b)
23. (b)
24. (a)
25. (d)
26. (c)
27. (a)
28. (a)
29. (b)
30. (c)