Give a brief overview of the carbon cycle. Include the source of carbon that enters ecosystems, how it moves through ecosystems, what it is used for, and where it is ultimately deposited
What part of this cycle is believed to contribute to global warming?
Plants take up CO2 from the atmosphere and then incorporate the carbon into their tissue. Animals then eat plants and gain carbon. Carbon is used for all the tissues and molecules of living organisms, such as carbohydrates, fats, and proteins, and as an essential ingredient in DNA. When animals and plants die, their tissues are metabolized by decomposers and much partially degraded biomass (especially from plants) is then deposited into soils. At each stage along the way, some carbon is released back to the atmosphere as carbon dioxide. The use of fossil fuels (previously undecomposed organic materials) causes stored CO2 to be released to the atmosphere. This is occurring at very high rates and is contributing to global warming.
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On October 19, 2007, the storm had moved 600 km (360 mi) eastward. Estimate what the conditions were in Springfield, Illinois, on that day. List what you think the temperature, approximate dew-point temperature, and wind speed and direction were on October 19. Which type of air mass was overhead?
What will be an ideal response?
What do the simplest vertebrates lack?
a. Jaws b. Notochord c. Central nervous system d. Teeth
Which factor most often causes voluntary migration?
A) economic B) environmental C) international D) political E) a regional conflict
One important relationship between chemical and mechanical weathering is ________.
a. mechanical weathering can produce smaller pieces of rock that have more surface area for chemical weathering to work on. b. chemical weathering can produce smaller pieces of rock that can then be modified by mechanical weathering