1. Where is the most severe coastal hypoxia around the world? 2. Which of the fo
ID: 291813 • Letter: 1
Question
1. Where is the most severe coastal hypoxia around the world?
2.
Which of the following is true of the the law of conservation of energy?
3. One way carbon is returned to the atmosphere is through photosynthesis.
4. What does the graph of carbon dioxide concentrations in the atmosphere measured at Mauna Loa, Hawaii, show?
A. the Mediterranean coast B. the east and southeast coast of the United States and the northern European coastline C. the east coast of South America D. the east coast of Australia E. the west coast of AfricaExplanation / Answer
1.(b) the east and south east coast of the United States and the northern European coastline.
Explanation : Hypoxia is the condition of low oxygen. It occurs near sediments at the bottom as well as at high altitudes mostly due to eutrophication or pollution of a bloom. Shallow waters of semi enclosed bodies such as the eastern and south eastern coast of the US and the coastline of northern Europe.
2.(c) Energy is not created or destroyed under ordinary conditions,but it may be changed from one form to another.
Explanation : According to the law of conservation of energy, energy can neither be created nor destroyed but it can only be changed from one form to another. For example when a moving car having kinetic energy hits a board, the board falls over. The kinetic energy from the car us transferred onto the board which caused the board to move and finally fall down. Thus energy was transported from one object to another but no energy was lost in the transfer process. At our homes, the electrical energy is converted into light energy, heat energy etc.
3. False.
Explanation : One way carbon is removed from the atmosphere is through photosynthesis. Carbon is returned to the atmosphere by the processes of animal and plant respiration or by the combustion of organic matter, burning of fossil fuels, wood etc.
4.(d) an overall rise from 1960 to the present, with annual variation showing more in January - March and less in June - September.
Explanation : The overall concentration of carbon dioxide has shown a steady increase or rise in its trend since 1960 with seasonal fluctuations. The amount of carbon dioxide falls or becomes less between the months of April and August due to the seasonal increase in the rate of photosynthesis in the summer months in the northern hemisphere forests. Photosynthesis removes carbon dioxide from the atmosphere.
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