QUESTION 16 Concentrations of ________ have been reduced as a result of the Mont

Question

QUESTION 16

Concentrations of ________ have been reduced as a result of the Montreal Protocol.

CFCs

ozone

CO2

nitrous oxide

CH4

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QUESTION 17

In a body of water becoming eutrophic, which of the following would be observed to decrease?

dissolved oxygen

nitrogen

lipids and hydrocarbons

phosphorus

carbon dioxide

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QUESTION 18

Coal, oil, and natural gas are ________.

fossil fuels

part of a sustainable energy future

synthetic

renewable

inorganic

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QUESTION 19

Roughly two thirds of this greenhouse gas evaporates into the atmosphere as a byproduct of soil management. Which one is it?

Carbon Dioxide

Methane

Nitrous Oxide

Chlorofluorocarbons

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QUESTION 20

The greenhouse effect is ________________.

incoming shortwave radiation converted into longwave radiation, which is then trapped by atmospheric gases

reflection of longwave radiation after converted shortwave radiation is trapped by atmospheric gases

carbon dioxide buildup in the atmosphere

global warming due to ozone depletion

none of the above

Explanation / Answer

16. Concentration of ozone have been reduced as a result of the Montreal Protocol.

To reduce the ozone it uses the chemicals that are ozone-damazing such as CFC, HCFC etc and it is aimed to ban the global production.

17. In a body of water becoming eutropic, dissolved oxygen would be observed to decrease.

At some situation when the nutrients especially the nitrogen and phosphorous of lakes or pond increases excessively, the lake becomes able to support abundance of aquatic plants. Thus an oligotropic lake become an eutropic lake which has high biological activity and low amount of dissolved oxygen.

18. Coal, oil and natural gas are fossil fuels.

These are formed by natural processes by decaying plants and animals over hundreds of million of years. The main disadvantage of these are they are non-renewable and on burning they produce greenhouse gases which causes global warming.

19. Roughly two third of this greenhouse gas evaporates into the atmosphere as a by product of soil managment. It is carbon Dioxide.

It causes to raise the global temperature and a reason for global warming.

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