Approximately how long are fossil fuels, specifically coal, going to last (at the present level of consumption/use)?
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1 point
10 years
Forever because they are renewable
100 years (a century)
1000 years (a millennia)
100 years (a century)
At present, fossil fuels constitute a major source of primary energy, yet they are also the cause of large, looming problems. Which one of these problems seems MOST important in THIS specific video?
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1 point
Pollution
Acid rains
Climate change
Depletion and near future shortages
Climate change
What additional renewable energy sources were mentioned in the video?
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1 point
Hydroelectric, geothermal, and biomass
Soil and minerals
Fossil fuels
Electricity and liquid fuels
Hydroelectric, geothermal, and biomass
How did erosion and deposition change the position of soil during the Dust Bowl?
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1 point
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Weathering of the soil due to deposition left the soil exposed to poor farming practices. The wind then carried the soil particles to various places and eroded them.
Poor farming practices and drought left dry topsoil exposed to the wind. The wind then carried the soil particles to various places and deposited them.
Deposition of the soil due to poor farming practices left the soil exposed to the wind. The wind then carried the soil particles to various places and weathered them.
Poor farming practices and drought left dry topsoil exposed to the wind. The wind then carried the soil particles to various places and deposited them.
6. Which of the following correctly describes what an ore is?
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1 point
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An ore is a natural, non-living solid formed of specific atoms in a certain arrangement
An ore is a natural material that has one or more minerals in it, with the mineral(s) being at a high enough concentration to make it profitable to mine the ore and get the mineral(s) out of it
An ore is a place where a large amount of a mineral is found
An ore is a resource that will last for a long time and does not harm the environment when used