- 1(current)
Q. No.The thawing of permafrost in many areas of the tundra biome as a result of global warming is of concern mainly because:
| 1. | it will decrease the abundance and diversity of soil-dwelling organisms in tundra habitats. |
| 2. | the bacterial decomposition of the thawed organic materials will produce large quantities of CO2, increasing global warming. |
| 3. | Oil and coal deposits will rise to the surface |
| 4. | migration of the human population will occur towards the tropics. |
The environmental effects of global warming include all the following except:
| 1. | Arctic sea ice decline, sea level rise, retreat of glaciers |
| 2. | Extreme weather, extreme events, tropical cyclones |
| 3. | Ocean oxygenation and increased alkalinity of ocean waters |
| 4. | Runaway and abrupt climate change |
What is most likely to occur due to continued global warming?
| 1. | Poleward movement of plant communities |
| 2. | A fall in the sea levels |
| 3. | Increased decomposition of organic matter in the polar region |
| 4. | Increase in tundra regions |
Which of the following commits the industrialised nations to reduce greenhouse gas emissions?
1. Montreal protocol
2. Kyoto protocol
3. UNECD earth summit
4. Alma Atta conference
Match each item in Column I with one item in Column II regarding the relative contribution of different greenhouse gases to global warming and choose your answer from the codes given below.
| Column I | Column II | ||
| I. | Carbon dioxide | 1. | 60% |
| II. | Methane | 2. | 20% |
| III. | Nitrous oxide | 3. | 14% |
| IV. | CFCs | 4. | 06% |
Codes:
| Options: | I | II | III | IV |
| 1. | 1 | 2 | 3 | 4 |
| 2. | 2 | 1 | 4 | 3 |
| 3. | 2 | 1 | 3 | 4 |
| 4. | 1 | 2 | 4 | 3 |
The group most profoundly affected by global warming normally is:
| 1. | Plants | 2. | Insects |
| 3. | Birds | 4. | Mammals |
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | Episodic shifts in winds and water currents across the equatorial Pacific can cause floods in the South American desert while stalling and drying up the monsoon in Indonesia and India. |
| Reason (R): | During an El Niño event, the surface waters in the central and eastern Pacific Ocean become significantly colder than usual. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
- 1(current)
Q. No.
© 2024 GoodEd Technologies Pvt. Ltd.