Creeping carbon By burning fossil fuels, humans release more than 10 billion ton

Question

Creeping carbon

By burning fossil fuels, humans release more than 10 billion tonnes of CO2 per year. This gas enters the atmosphere and subsequently diffuses into the tissue of plants or bodies of water around the world. The net effect of CO2 emissions has been an exponential increase in the concentration of CO2 in the atmosphere. The figure below shows the changes in the concentration of CO2 in the atmosphere between 1958 and 1993, recorded at a research station in Hawaii.

ANSWER TRUE OR FALSE AND EXPLAIN.

1. The decrease in CO2 within each year likely reflects the uptake of CO2 by plants during spring and summer.

2. The additional CO2 in the atmosphere heats the Earth by absorbing radiation from the sun.

3. Because of teleconnections resulting from circulating air and water, the samples in this graph likely reflect changes in atmospheric CO2 recorded at other places on Earth.

4. Because of negative feedback, the concentration of CO2 will continue to increase even if people were to cease burning fossil fuels.

5. During this period, the concentration of carbon in the oceans likely increased.

350 340 330 320 310 1955 1960 1965 1970 1975 1990 1980 1985 YEAR Use this information and your knowledge of biology to answer the following questions.

Explanation / Answer

Question: The decrease in CO2 within each year likely reflects the uptake of CO2 by plants during spring and summer.

Answer: “TRUE” The change in concentration of Carbon di oxide in atmosphere is regulated by season. During summer and spring season there is reasonable to decrease in CO2 level because, this is the season when all the plants grow or produce new leaves and fruits so they consume CO2 from atmosphere.

Question: The additional CO2 in the atmosphere heats the Earth by absorbing radiation from the sun.

Answer: “TRUE” Carbon di oxide is a greenhouse gas as it traps the solar radiation so that average temperature on the surface would rise cause more variation in weather pattern.

Question: Because of teleconnections resulting from circulating air and water, the samples in this graph likely reflect changes in atmospheric CO2 recorded at other places on Earth.

Answer; “TRUE”, The released carbon di oxide will always balance by consumption for some other task within earth. But there is always difference in CO2 level between two hemispheres of earth. The northern hemisphere is having more land and number of plants then southern hemisphere. Also, the air in northern hemisphere will not mix quickly with of southern hemisphere so creating difference.

Question: Because of negative feedback, the concentration of CO2 will continue to increase even if people were to cease burning fossil fuels.

Answer: “FALSE” As the CO2 released into the atmosphere by human activity is only half of the total concentration in atmosphere. Over the past years the CO2 released by burning of fossil fules has been absorbed by atmospheric sink.

Question: During this period, the concentration of carbon in the oceans likely increased.

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