Question 1 (5 points)
_______ energy results from the combination of kinetic and potential energy.
Question 2 (5 points)
_______ is a vital, rare earth mineral extracted from briny pools located in the Andes.
Question 3 (5 points)
Percentage-wise, which renewable energy source is used most?
Question 4 (5 points)
All of the following are problems related to wind power, except
Question 5 (5 points)
The fact that sunlight is not directly available at night or on cloudy days is referred to as the _______ problem.
Question 6 (5 points)
Two students are discussing energy sectors in the United States. Student 1 claims that the commercial sector includes automobiles and churches. Student 2 agrees but also includes construction in the commercial list. Who is correct?
Question 7 (5 points)
In general, the efficiency of an internal combustion engine is thirty percent. The remaining seventy percent is mainly dissipated as _______ energy.
Question 8 (5 points)
The first law of thermodynamics, also called the _______ law, says that the total energy of the universe is constant.
Question 9 (5 points)
How many calories in a kilocalorie?
Question 10 (5 points)
Burning biomass for fuel expresses carbon _______, because it balances the amount of carbon added and removed from the atmosphere.
Question 11 (5 points)
Which statement is false as regards hydroelectric power?
Question 12 (5 points)
Peat is the least carbon-rich substance burned for fuel. The coal with the richest carbon content is _______ coal.
Question 13 (5 points)
Energy efficiency is reduced as we _______ the number of steps needed to get energy from its source to useful work.
Question 14 (5 points)
The three stages in the combustion of gas in an internal combustion engine are combustion, thermal energy, and _______ energy.
Question 15 (5 points)
Two students are discussing the disadvantages of biomass. Student 1 claims that when biomass is burned, too many toxins are released, worsening air pollution. Student 2 claims that planting biofuel crops uses too much farmland that could be used for food. According to this course, who is correct?
Question 16 (5 points)
Which sector has consistently used the greatest percentage of energy in the United States?
Question 17 (5 points)
According to the third law of thermodynamics, energy ceases to exist at a temperature called absolute zero. This is considered a(n) _______ limit.
Question 18 (5 points)
The United States produced 16 quadrillion BTUs of which type of energy in 2017?
Question 19 (5 points)
Globally, more than half of consumed energy is in the _______ sector.
Question 20 (5 points)
Which statement regarding nuclear fission is true?