NFL08

The Gators are national champions for the second time in 3 years.

Also the SEC is 5-0 in BCS National Championship games. :) wow.

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 * || A yo-yo does not continue to go up and down forever. If energy is not destroyed, what causes the yo-yo to stop? ||
 * ||  || A) ||   || The energy required to go up is more than the energy required to go down. || ||
 * ||  || B) ||   || The energy in the yo-yo is not really there to begin with. || ||
 * || **CORRECT** || C) ||  || Some energy is lost to friction. || ||
 * ||  || D) ||   || Energy is gained as the yo-yo climbs the string. || || || The correct answer is C. The friction of the string and the yo-yo will eventually cause the yo-yo to stop. ||
 * || Which of the following is not an example of potential energy? ||
 * ||  || A) ||   || a battery || ||
 * ||  || B) ||   || a stretched rubber band || ||
 * || **CORRECT** || C) ||  || a speeding bullet || ||
 * ||  || D) ||   || a stick of dynamite || || || The correct response is C. A speeding bullet is moving, so it is an example of kinetic energy. ||
 * || The average kinetic energy of the molecules in a substance refers to its ______. ||
 * ||  || A) ||   || heat || ||
 * || **CORRECT** || B) ||  || temperature || ||
 * || **INCORRECT** **X** || C) ||  || momentum || ||
 * ||  || D) ||   || viscosity || || || The correct answer is B. Temperature is a measure of the average kinetic energy of the molecules in a substance.
 * || Stored energy is also known as ___ energy. ||
 * ||  || A) ||   || kinetic || ||
 * || **CORRECT** || B) ||  || potential || ||
 * ||  || C) ||   || dark || ||
 * ||  || D) ||   || solar || || || The correct answer is B. Stored energy is potential energy. ||
 * || How does the energy available from nuclear fuels compare with that from coal or oil? ||
 * ||  || A) ||   || Nuclear fuels provide less energy than the same amount of coal or oil. || ||
 * ||  || B) ||   || Nuclear fuels provide energy that is equal to the same amount of coal or oil. || ||
 * ||  || C) ||   || Nuclear fuels provide about ten times more energy than the same amount of coal or oil. || ||
 * || **CORRECT** || D) ||  || Nuclear fuels provide millions of times more energy than the same amount of coal or oil. || || || The correct answer is D. Nuclear fuels provide millions of times more energy than the same amount of coal or oil. ||
 * || Which of the following phase changes requires a substance to lose energy? ||
 * || **CORRECT** || A) ||  || freezing || ||
 * ||  || B) ||   || melting || ||
 * ||  || C) ||   || sublimation || ||
 * ||  || D) ||   || vaporization || || || The correct response is A. When a substances freezes, it loses energy, making the molecules move slower and come together. ||
 * || When riding a roller coaster, you go up and down many hills. As you get to the top of a roller coaster, what energy change is taking place? ||
 * || **INCORRECT** **X** || A) ||  || potential energy is changed into kinetic energy || ||
 * || **CORRECT** || B) ||  || kinetic energy is changed into potential energy || ||
 * ||  || C) ||   || chemical energy is changed into heat energy || ||
 * ||  || D) ||   || heat energy is changed into chemical energy || || || The correct response is B. As you move to the top of the roller coaster, the kinetic energy decreases, and the car slows down. The car reaches the top, and now has all its energy stored as potential energy, making it ready to go down another hill.
 * || Stored energy is also known as _____ energy. ||
 * ||  || A) ||   || kinetic || ||
 * ||  || B) ||   || nuclear || ||
 * ||  || C) ||   || thermal || ||
 * || **CORRECT** || D) ||  || potential || || || The correct answer is D. Stored energy is potential energy. ||
 * || Humans use the process of ________ energy transformation after consuming food. ||
 * || **CORRECT** || A) ||  || chemical || ||
 * ||  || B) ||   || kinetic || ||
 * ||  || C) ||   || potential || ||
 * ||  || D) ||   || electrical || || || The correct answer is A. The digestive system uses acids to break down foods and then chemically convert them into energy. ||
 * || One reason that solar energy is not used as much as gasoline for automobiles is that _____________. ||
 * || **CORRECT** || A) ||  || solar cells require constant sunlight to generate power || ||
 * ||  || B) ||   || solar energy is not as cheap as gasoline || ||
 * ||  || C) ||   || only the government can have solar cells || ||
 * ||  || D) ||   || solar energy is not as safe as using gasoline || || || The correct answer is A. Solar cells do not provide much power on cloudy days or at night. ||
 * || At higher temperatures, gases have _______ energy. ||
 * || **CORRECT** || A) ||  || higher || ||
 * ||  || B) ||   || lower || ||
 * ||  || C) ||   || the same || ||
 * ||  || D) ||   || more dense || || || The correct response is A. Gases have much more energy as their temperatures increase. ||
 * || When a substance loses heat energy, __________. ||
 * || **CORRECT** || A) ||  || its molecules slow down || ||
 * ||  || B) ||   || its molecules speed up || ||
 * ||  || C) ||   || its molecules are not affected || ||
 * ||  || D) ||   || its molecules break apart || || || The correct answer is A. The molecules slow down in a substance losing energy. ||
 * || What is the energy source plants use to produce their own food? ||
 * || **CORRECT** || A) ||  || the sun || ||
 * ||  || B) ||   || the atmosphere || ||
 * ||  || C) ||   || nutrients in the soil || ||
 * ||  || D) ||   || water || || || The correct answer is A. The atmosphere, nutrients, and water are involved in photosynthesis, but they are not the source of energy. ||
 * || Which is a source of electrical energy? ||
 * ||  || A) ||   || television || ||
 * ||  || B) ||   || radio || ||
 * || **INCORRECT** **X** || C) ||  || plug || ||
 * || **CORRECT** || D) ||  || battery || || || The correct answer is D. A battery provides electrical energy to a circuit.
 * || Which of the following is a problem associated with solar energy? ||
 * ||  || A) ||   || It is a very expensive to obtain. || ||
 * ||  || B) ||   || It has harmful side effects for people who use it. || ||
 * ||  || C) ||   || It is a nonrenewable energy source. || ||
 * || **CORRECT** || D) ||  || The sun does not always shine to provide energy. || || || The correct response is D. Solar energy needs to be stored, because the sun does not always shine to provide power directly. ||
 * || The energy-producing reaction that takes place in the sun's core is ____________. ||
 * ||  || A) ||   || combustion || ||
 * || **INCORRECT** **X** || B) ||  || nuclear fission || ||
 * ||  || C) ||   || decomposition || ||
 * || **CORRECT** || D) ||  || thermonuclear fusion || || || The correct answer is D. Thermonuclear fusion takes place in the sun's core. Hydrogen atoms fuse together release energy.
 * || The energy in fossil fuels originated from ___________. ||
 * ||  || A) ||   || rocks || ||
 * || **CORRECT** || B) ||  || the sun || ||
 * || **INCORRECT** **X** || C) ||  || dinosaur bones || ||
 * ||  || D) ||   || the center of the Earth || || || <span class="assessment_text">The correct answer is B. Energy from sunlight was used by photosynthetic organisms to produce glucose. When these organisms died, they were buried by sediment. Pressure, heat, and time transformed them into fossil fuels.
 * || A battery in a radio provides stored chemical energy, which is converted into _________ energy by the radio. ||
 * ||  || A) ||   || mechanical || ||
 * ||  || B) ||   || frictional || ||
 * ||  || C) ||   || magnetic || ||
 * || **CORRECT** || D) ||  || electrical || || || <span class="assessment_text">The correct response is D. Batteries turn chemical energy into electricity. ||
 * || The law of _________ states that energy is not truly produced, but really only manipulated from one form to another. ||
 * || **INCORRECT** **X** || A) ||  || energy production || ||
 * ||  || B) ||   || energy transference || ||
 * || **CORRECT** || C) ||  || conservation of energy || ||
 * ||  || D) ||   || manipulation of energy || || || <span class="assessment_text">The correct answer is C. During energy transformations, energy cannot be created or destroyed.
 * || A falling object has which type of energy? ||
 * ||  || A) ||   || radiant || ||
 * ||  || B) ||   || potential || ||
 * ||  || C) ||   || electrical || ||
 * || **CORRECT** || D) ||  || kinetic || || || <span class="assessment_text">The correct answer is D. Kinetic energy refers to energy of motion. ||
 * || The total kinetic energy of the molecules in a substance refers to its __________. ||
 * || **CORRECT** || A) ||  || heat || ||
 * ||  || B) ||   || temperature || ||
 * || **INCORRECT** **X** || C) ||  || momentum || ||
 * ||  || D) ||   || viscosity || || || <span class="assessment_text">The correct answer is A. Heat, or thermal energy, refers to the total kinetic energy of all of the molecules in a substance.
 * || When a log is burned, what is produced that is not a form of energy? ||
 * ||  || A) ||   || heat || ||
 * || **CORRECT** || B) ||  || smoke || ||
 * ||  || C) ||   || sound || ||
 * ||  || D) ||   || light || || || <span class="assessment_text">The correct response is B. Smoke is not a form of energy. ||
 * || Which way of getting a rock to the top of a cliff will give the rock the most potential energy? ||
 * ||  || A) ||   || Lifting the rock will yield the most potential energy. || ||
 * ||  || B) ||   || Using the ramp will provide the most potential energy. || ||
 * ||  || C) ||   || Using the stairs will provide the most potential energy. || ||
 * || **CORRECT** || D) ||  || It doesn't matter, each way will provide the same potential energy. || || || <span class="assessment_text">The correct response is D. The rock will be four meters above the ground regardless of how it gets there, so it would have the same potential energy in each case. ||
 * || Where do plants get the energy they need to carry out photosynthesis? ||
 * || **CORRECT** || A) ||  || the sun || ||
 * ||  || B) ||   || the ground || ||
 * ||  || C) ||   || carbon dioxide in the air || ||
 * ||  || D) ||   || oxygen and carbon dioxide in the air || || || <span class="assessment_text">The answer is A. The sun supplies the energy necessary to start photosynthesis which produces glucose from water and gases in the air. ||
 * || A battery stores electrical energy in what form? ||
 * || **CORRECT** || A) ||  || chemical energy || ||
 * ||  || B) ||   || mechanical energy || ||
 * ||  || C) ||   || nuclear energy || ||
 * ||  || D) ||   || radiant energy || || || <span class="assessment_text">The correct answer is A. Batteries store energy in chemical form. ||
 * || The defrosting mechanism in the rear window of a car coverts which type of energy into heat? ||
 * ||  || A) ||   || vibrations || ||
 * ||  || B) ||   || sound || ||
 * ||  || C) ||   || solar energy || ||
 * || **CORRECT** || D) ||  || electricity || || || <span class="assessment_text">The correct answer is D. Electricity from the car's electrical system passes through the defrosting mechanism, creating heat to melt ice and frost. ||
 * || When you swing a bat and hit a baseball, the ball flies into the outfield. What happens to the energy you used to swing the bat? ||
 * ||  || A) ||   || It disappears. || ||
 * ||  || B) ||   || It remains in the bat. || ||
 * || **CORRECT** || C) ||  || It is transferred to the baseball. || ||
 * ||  || D) ||   || It is converted into potential energy. || || || <span class="assessment_text">The correct response is C. The energy you used to swing the bat gets transferred to the baseball, giving it the energy to fly into the outfield. ||
 * || What form of energy causes water to change from a liquid to a gas? ||
 * || **CORRECT** || A) ||  || heat || ||
 * ||  || B) ||   || sound || ||
 * ||  || C) ||   || waves || ||
 * ||  || D) ||   || light || || || <span class="assessment_text">The correct answer is A. Heat energy causes liquid water to change to its gaseous state. ||
 * || Which of the following sources of energy results in the least amount of pollution? ||
 * ||  || A) ||   || fuel oil || ||
 * || **CORRECT** || B) ||  || solar energy || ||
 * ||  || C) ||   || natural gas || ||
 * ||  || D) ||   || coal || || || <span class="assessment_text">The correct answer is B. All three fossil fuels put some pollution into the air. Solar energy is non-polluting. ||
 * || Thermal energy is ________. ||
 * ||  || A) ||   || light || ||
 * || **CORRECT** || B) ||  || heat || ||
 * ||  || C) ||   || sound || ||
 * ||  || D) ||   || electricity || || || <span class="assessment_text">The correct answer is B. Thermal energy is heat. ||
 * || Which statement best describes the law of conservation of energy? ||
 * || **INCORRECT** **X** || A) ||  || When energy changes forms, some is always lost. || ||
 * || **CORRECT** || B) ||  || Energy cannot be created or destroyed, but it can be changed into different forms. || ||
 * ||  || C) ||   || When energy changes forms, the second form always has more energy than the first. || ||
 * ||  || D) ||   || Once energy is used, it is exhausted and cannot be used again. || || || <span class="assessment_text">The correct answer is B. The law of conservation of energy states that energy cannot be created or destroyed. The only thing that changes is the form.
 * || Air and water are in constant motion due to energy from _________. ||
 * ||  || A) ||   || volcanoes || ||
 * ||  || B) ||   || cosmic rays || ||
 * || **CORRECT** || C) ||  || the sun || ||
 * ||  || D) ||   || Earth's magnetic field || || || <span class="assessment_text">The correct answer is C. Energy from the sun keeps air and water on the Earth in constant motion. ||
 * || The biggest problem with using batteries to store electrical energy is that batteries __________. ||
 * ||  || A) ||   || are very hard to manufacture || ||
 * ||  || B) ||   || always leak || ||
 * || **CORRECT** || C) ||  || are inefficient || ||
 * ||  || D) ||   || are very dangerous || || || <span class="assessment_text">The correct answer is C. Batteries are an inefficient means of storing electricity. ||
 * || Wind turbines turn energy from the wind into mechanical energy. What causes the wind? ||
 * ||  || A) ||   || the tides of nearby oceans || ||
 * ||  || B) ||   || the altitude of nearby mountains || ||
 * || **CORRECT** || C) ||  || the energy of the sun || ||
 * || **INCORRECT** **X** || D) ||  || the gravity of the earth || || || <span class="assessment_text">The correct response is C. The sun's energy warms the air creating areas of higher and lower pressure. Winds are created as air moves from an area of higher pressure to an area of lower pressure.
 * || A lump of coal is an example of what kind of potential energy? ||
 * ||  || A) ||   || radiant || ||
 * ||  || B) ||   || thermal || ||
 * || **CORRECT** || C) ||  || chemical || ||
 * || **INCORRECT** **X** || D) ||  || mechanical || || || <span class="assessment_text">The correct answer is C. Coal is an example of chemical potential energy.
 * || When gasoline burns, stored chemical energy is released in two forms: light and ___________. ||
 * ||  || A) ||   || fumes || ||
 * || **INCORRECT** **X** || B) ||  || carbon dioxide || ||
 * ||  || C) ||   || water || ||
 * || **CORRECT** || D) ||  || heat || || || <span class="assessment_text">The correct answer is D. Stored chemical energy is the released heat energy that causes parts of the car to move.

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