Question
(a) Choose words or phrases from the list to complete the sentences about the enhanced greenhouse effect.
Each word or phrase may be used once, more than once or not at all.
carbon dioxide carbon monoxide deforestation
flooding egestion methane nitrogen
photosynthesise respire water vapour
The enhanced greenhouse effect leads to climate change. One reason for this increased effect is that many trees are cut down. Cutting down large areas of trees is called ……………………………… .
When trees are cut down they cannot ……………………………… and so the concentration of ……………………………………………… in the atmosphere increases.
Another gas that increases the greenhouse effect is ………………………………. .
(b) Describe two reasons why humans cut down trees.
1 ………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
2 ………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
(c) An increase in some greenhouse gases is one undesirable effect of cutting down trees.
State two other examples of these undesirable effects.
1 ………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
2 ………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
Answer/Explanation
Ans: () deforestation ;
photosynthesise ;
carbon dioxide ;
methane /water vapour ;
(b) more land area ;
for farming /grow crops /rear animals / for building houses / factories etc. / approaching enemies can be seen/ for roads /pylons /fences etc. /for mines ;;
obtain wood ;
for building /making furniture /warmth / cooking/ make smoke /to make paper ;;
to destroy habitats (of unwanted animals / plants) ;
to deter wild/ dangerous animals ;
AVP ;
(c) flooding ;
soil erosion ;
leaching ;
mud slides ;
desertification ;
changing weather patterns ;
habitat destruction /extinction /loss of biodiversity ;
loss of potential medical chemicals ;
AVP ;;
Question
Table shows some information about air pollution.
(a) Complete Table by writing answers in the spaces indicated. [2]
(b) Explain how the increased greenhouse effect is thought to lead to global warming.
(c) Figure shows changes in the emissions of sulfur dioxide in Europe between 1880 and
2004.
(i) Use the information in Figure to describe the changes in the emissions of sulfur
dioxide in Europe between 1880 and 2004.
(ii) Describe the effects of acid rain on the environment.
(iii) Outline the methods that have been used to reduce the emissions of sulfur dioxide.
Answer/Explanation
Ans:
