Question 1 Which of the following processes is an example of a carbon sink? Ques

Question

Question 1

Which of the following processes is an example of a carbon sink?

Question 2

The factors that affect Earth's long-term climate are different from those that affect climate on shorter time scales.

Question 3

A runaway greenhouse effect is an example of what kind of feedback mechanism?

Question 4

Which of the following is not a greenhouse gas?

Question 5

Ice cores from continental glaciers provide geologists with a record of climate change, but the record is limited to approximately _____ years before present.

Question 6

Which of the following is an important long-term factor in global climate change?

Question 7

Sea levels are rising globally due to _____.

Question 8

_____ is the amount of solar radiation (per unit area and time) that the Earth receives from the Sun.

Question 9

_____ is not one of the orbital cycles identified by Milankovitch.

Question 10

The United States has recently _____ regulations intended to decrease greenhouse gas emissions.

Explanation / Answer

1. An example of carbon sink is photosynthesis.

Carbon sink is a natural or artificial reservoir that stores carbon for a longer period of time. Plants are the main natural sinks as they take carbon dioxide from the atmosphere for photosynthesis.

2. The factors that affect Earth's long-term climate are different from those that affect climate on shorter time scales - False.

The factors are same for long-term and shorter term climate. The main factors include elevation, latitude, ocean currents, vegetation, topography and wind.

3. A runaway greenhouse effect is an example of positive kind of feedback mechanism.

A runaway greenhouse effect is a process in which the strength of the greenhouse gases on a planet increases as a result of net positive feedback between surface temperature and atmospheric opacity.

4. Oxygen is not a greenhouse gas.

Greenhouse gas is a gas composed of molecules that absorb and radiate infrared electromagnetic radiation. The principle greenhouse gases are water vapour, carbon dioxide, methane etc.

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