Exam 3.docx - Question 1 3 out of 3 points Firewood is...

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Question 1 3 out of 3 points Firewood is still a primary source for heat and cooking for many people across the world. Selected Answer: True Correct Answer: True Resp onse This is true. Mostly it is used by people in developing countries, but even in the U.S., some
Feedb ack: people use it to heat their homes. Question 2 3 out of 3 points
In solar power technologies, photovoltaic cells heat fluid that powers a turbogenerator for electricity. Selected Answer: False Correct Answer: False Resp onse Feedb ack: No, these cells generate a flow of electrons internally, and do not heat up any fluid that then powers a turbogenerator. Question 3 3 out of 3 points
Solar water heaters work by circulating water through tubes in a black material that absorbs heat from solar radiation. Selected Answer: True Correct Answer: True Response Feedback: Yes, although this may be a bit simplistic, this is the general idea. Question 4 3 out of 3 points Which of the following is NOT a form of renewable energy?
Selected Answer: nuclear Correct Answer: nuclear Resp onse Feedb ack: Nuclear power uses Uranium, which is a mined mineral. Scientists estimate that we have about 100 years worth of this fuel available on Earth (at current consumption rates). Question 5 3 out of 3 points Fish ladders are ___________________.
Selecte d Answer : used to provide an alternate route for migrating fish so they can get around a dam Correct Answer : used to provide an alternate route for migrating fish so they can get around a dam Question 6 3 out of 3 points Solar power accounts for a larger share of electricity (and overall energy) production in the U.S. than hydropower.
Correct Answer: False Resp onse Feedb ack: No. Although this power source is becoming more efficient and is becoming much more popular, hydropower is still a much bigger provider of energy in the U.S. Question 7 3 out of 3 points Biodiesel can be made from recycled vegetable oils (like the used stuff in fast food fryers).
Question 8 3 out of 3 points Geothermal energy can be used to generate electricity. Selected Answer: True Correct Answer: True
Resp onse This is true, using the heat to create steam that powers a turbogenerator. It can also be
Feedb ack: used to directly heat (or even cool) a house/building.

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