Mr Fays Energy Quiz
Testing your understanding of Chapter 35 of Science Matters.
Questions and Answers
- 1.
.Which of the following is the best example of increasing an object's potential energy?
- A.
 rolling a bowling ball
- B.
 turning on a light bulb
- C.
 stretching a rubber band
- D.
 dropping a pencil
Correct Answer
C. Â stretching a rubber bandExplanation
Stretching a rubber band is the best example of increasing an object's potential energy because when a rubber band is stretched, work is done to overcome the elastic forces within the rubber band, causing it to store potential energy. The potential energy is stored in the stretched rubber band and can be released when the rubber band is allowed to return to its original shape. This is a clear example of increasing potential energy as the rubber band is being stretched and its potential energy is increasing.Rate this question:
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- 2.
An object that has kinetic energy must be...
- A.
 lifted above earth's surface.
- B.
 in motion.
- C.
 at rest.
- D.
 None of the above.
Correct Answer
B. Â in motion.Explanation
An object that has kinetic energy must be in motion. Kinetic energy is the energy possessed by an object due to its motion. It is directly proportional to the mass of the object and the square of its velocity. Therefore, for an object to have kinetic energy, it must be in motion. If the object is at rest or lifted above the earth's surface, it will not possess kinetic energy.Rate this question:
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- 3.
. Sound energy is...
- A.
 the energy of a compound that changes as its atoms are rearranged to form new compounds
- B.
 the total energy of the particles that make up an object.
- C.
 The energy caused by an object's vibrations.
- D.
 the energy of motion.
Correct Answer
C. Â The energy caused by an object's vibrations.Explanation
Sound energy is the energy caused by an object's vibrations. When an object vibrates, it creates sound waves that travel through a medium, such as air or water. These waves carry energy, and when they reach our ears, they are detected as sound. The energy of the vibrations is what we perceive as sound energy.Rate this question:
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- 4.
Which of the following convert chemical energy to mechanical energy?
- A.
 human
- B.
Car
- C.
Jet Ski
- D.
All of above
Correct Answer
D. All of aboveExplanation
All of the options mentioned in the question, including human, car, and Jet Ski, have the ability to convert chemical energy to mechanical energy. Humans convert chemical energy from food into mechanical energy to perform physical tasks. Cars and Jet Skis convert chemical energy from fuel into mechanical energy to propel themselves. Therefore, all of the above options are correct.Rate this question:
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- 5.
Which of the following is a conversion from chemical energy to thermal energy?
- A.
 Coal is burned to boil water.
- B.
 Food is digested and used to regulate body temperature.
- C.
 Charcoal is burned in a barbeque pit.
- D.
All of above
Correct Answer
D. All of aboveExplanation
The conversion from chemical energy to thermal energy occurs in all of the given options. When coal is burned to boil water, the chemical energy stored in coal is released and converted into thermal energy, heating the water. Similarly, when food is digested and used to regulate body temperature, the chemical energy in food is converted into thermal energy to maintain the body's temperature. Finally, when charcoal is burned in a barbeque pit, the chemical energy in charcoal is converted into thermal energy, producing heat for cooking. Therefore, all of the options involve the conversion from chemical energy to thermal energy.Rate this question:
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- 6.
As height increases, so does...
- A.
 thermal energy.
- B.
Mechanical energy.
- C.
 kinetic energy.
- D.
 potential energy.
Correct Answer
D. Â potential energy.Explanation
As height increases, potential energy also increases. This is because potential energy is the energy an object possesses due to its position or height above the ground. The higher an object is, the more potential energy it has. Therefore, as height increases, potential energy increases.Rate this question:
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- 7.
The law of _________________ of energy states that energy cannot be created or destroyed.
- A.
 transformation
- B.
 absorption
- C.
 conservation
- D.
 stability
Correct Answer
C. Â conservationExplanation
The law of conservation of energy states that energy cannot be created or destroyed, but it can only be transformed from one form to another. This means that the total amount of energy in a closed system remains constant. This principle is a fundamental concept in physics and is supported by numerous experiments and observations. It is a cornerstone of many scientific theories and has wide-ranging applications in various fields.Rate this question:
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- 8.
According to the law of conservation of energy, in theory, a bouncy ball should never stop bouncing. However, we know that it eventually stops. Where does the energy go.
- A.
 some gets converted into sound energy and escapes into the surroundings.
- B.
 some gets converted into thermal energy and escapes into the surroundings.
- C.
 Both A and B
Correct Answer
C. Â Both A and BExplanation
According to the law of conservation of energy, energy cannot be created or destroyed, only transferred or transformed. In the case of a bouncing ball, some of the energy is converted into sound energy as it collides with the surface and creates vibrations in the surrounding air. This sound energy then escapes into the surroundings. Additionally, some of the energy is converted into thermal energy due to the friction between the ball and the surface it bounces on. This thermal energy also escapes into the surroundings. Therefore, both options A and B are correct explanations for where the energy goes when a bouncy ball eventually stops bouncing.Rate this question:
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- 9.
Which one is not a fossil fuel
- A.
Oil
- B.
Wood
- C.
Coal
Correct Answer
B. WoodExplanation
Wood is not considered a fossil fuel because it is derived from living trees and plants, rather than from ancient organic matter that has undergone millions of years of heat and pressure. Fossil fuels like oil and coal are formed from the remains of plants and animals that lived millions of years ago and have been transformed over time. Wood, on the other hand, is a renewable resource that can be regrown and does not contribute to the release of carbon dioxide when burned.Rate this question:
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- 10.
What percentage of the Energy used around the world comes from Fossil Fuels
- A.
None
- B.
90%
- C.
40%
Correct Answer
B. 90%Explanation
Fossil fuels, such as coal, oil, and natural gas, have been the primary source of energy for many countries around the world for decades. They are widely used in various sectors such as electricity generation, transportation, and industrial processes. Due to their abundance and relatively low cost, fossil fuels have accounted for a significant portion of the global energy mix. Therefore, it is reasonable to estimate that around 90% of the energy used worldwide comes from fossil fuels.Rate this question:
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- 11.
Today, which renewable energy source provides Ireland. with the most energy?
- A.
Wind
- B.
Solar
- C.
Geothermal
- D.
Hydro
Correct Answer
D. HydroExplanation
Hydro is the correct answer because it refers to the renewable energy source that provides Ireland with the most energy today. This implies that hydroelectric power, which is generated from flowing or falling water, is the primary source of renewable energy in Ireland.Rate this question:
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- 12.
Electricity is the movement of
- A.
Atoms
- B.
Molecules
- C.
Electrons
- D.
Neutrons
Correct Answer
C. ElectronsExplanation
Electricity is the movement of electrons. Electrons are negatively charged particles that orbit around the nucleus of an atom. When a flow of electrons occurs, it creates an electric current, which is the basis of electricity. Atoms and molecules do not possess an electric charge, and neutrons are neutral particles that do not participate in electrical conduction. Therefore, the movement of electrons is the most accurate explanation for electricity.Rate this question:
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- 13.
Most of the energy we use originially came from the
- A.
Sun
- B.
Air
- C.
Soil
- D.
Oceans
Correct Answer
A. SunExplanation
The sun is the primary source of energy on Earth. It provides heat and light, which are essential for various processes and activities. The sun's energy is converted into different forms, such as solar energy, wind energy, and biomass energy, which are then used for various purposes. Without the sun, life on Earth would not be possible, as it plays a crucial role in sustaining ecosystems and driving climate patterns.Rate this question:
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- 14.
Electrical Energy can be produced from
- A.
Mechanical energy
- B.
Chemical energy
- C.
Radiant energy
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
Electrical energy can be produced from mechanical energy, such as in a generator where mechanical energy is converted into electrical energy. It can also be produced from chemical energy, as in batteries where chemical reactions generate electrical energy. Additionally, electrical energy can be produced from radiant energy, such as in solar panels where sunlight is converted into electrical energy. Therefore, all of the above options are correct as they can all produce electrical energy.Rate this question:
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- 15.
In a nuclear power plant, uranium atoms
- A.
Combine and give off heat energy
- B.
Split and give off heat energy
- C.
Burn and give off heat energy
- D.
Split and give offelectrons
Correct Answer
B. Split and give off heat energyExplanation
In a nuclear power plant, uranium atoms undergo a process called nuclear fission, where they split into smaller atoms and release a large amount of heat energy. This heat energy is then used to generate steam, which in turn drives turbines to produce electricity. Therefore, the correct answer is "split and give off heat energy."Rate this question:
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- 16.
Which of these energy changes take take place in a flashlight
- A.
Electrical to chemical to light to heat
- B.
Electrical to light to heat
- C.
Heat to light
- D.
Chemical to electrical to light to heat.
Correct Answer
D. Chemical to electrical to light to heat.Explanation
In a flashlight, the energy changes occur in the following sequence: chemical energy from the battery is converted into electrical energy, which is then transformed into light energy, and finally, some of the light energy is converted into heat energy. This is because the chemical reaction in the battery produces electrical energy, which is used to power the light bulb, and as the light bulb emits light, some of the energy is lost as heat.Rate this question:
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- 17.
One disadvantage of Nuclear Fission is
- A.
Its really smelly
- B.
The radioactive waste products
- C.
The temperature required to start the reaction
- D.
The lack of deuterium on earth.
Correct Answer
B. The radioactive waste productsExplanation
Nuclear fission produces radioactive waste products as a byproduct, which is a significant disadvantage. These waste products are highly hazardous and pose a threat to both human health and the environment. Proper disposal and management of these waste products are crucial to prevent contamination and long-term negative effects.Rate this question:
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- 18.
Which answer means energy on the move.
- A.
Kinetic Energy
- B.
Potential Energy
- C.
Nuclear Energy
- D.
Chemical Energy
Correct Answer
A. Kinetic EnergyExplanation
Kinetic energy refers to the energy possessed by an object due to its motion. It is the energy that an object possesses when it is in motion and can be transferred from one object to another. This energy is dependent on the mass and velocity of the object. Potential energy refers to the energy possessed by an object due to its position or state, while nuclear energy and chemical energy refer to specific forms of energy associated with atomic nuclei and chemical reactions, respectively. Therefore, the answer "Kinetic Energy" accurately represents energy on the move.Rate this question:
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- 19.
Which of these is a renewable energy source
- A.
Oil
- B.
Wind
- C.
Nuclear Energy
- D.
Gas
Correct Answer
B. WindExplanation
Wind is considered a renewable energy source because it is generated by natural processes and is constantly replenished. Unlike oil, gas, and nuclear energy, which are finite resources that will eventually run out, wind energy can be harnessed indefinitely as long as there is wind blowing. Wind turbines convert the kinetic energy of the wind into electricity, making it a sustainable and environmentally friendly option for generating power.Rate this question:
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- 20.
The Unit of Energy is
- A.
Watt
- B.
Joule
- C.
Volt
- D.
Ampere
Correct Answer
B. JouleExplanation
The unit of energy is joule. Watt is the unit of power, volt is the unit of electric potential difference, and ampere is the unit of electric current. Energy is measured in joules, which represents the amount of work done or the amount of heat transferred.Rate this question:
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- 21.
The best definition of enegry is
- A.
Something you can run out of
- B.
The ability to do work
- C.
The power of a force
- D.
Something you need to live
Correct Answer
B. The ability to do workExplanation
Energy is defined as the ability to do work. Work is defined as the transfer of energy from one object to another, or the application of force to move an object. Therefore, energy can be seen as the capacity or power to initiate or perform work. It is not something that can be run out of or solely related to the need for survival, but rather the capability to exert force and bring about change in a system.Rate this question:
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- 22.
In what forms is some energy usually lost when being transformed from one form to another
- A.
Heat and sound
- B.
Heat and light
- C.
Sound and light
- D.
Heat and water
Correct Answer
A. Heat and soundExplanation
When energy is transformed from one form to another, some energy is usually lost in the form of heat and sound. Heat is often generated as a byproduct of energy transformation due to the inefficiency of the process. Additionally, sound energy is produced when energy is converted, especially in cases where mechanical energy is involved. Therefore, both heat and sound are common forms of energy loss during transformation processes.Rate this question:
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- 23.
Which is the main energy transfer happening inside a car engine (just the engine part)
- A.
Chemical to heat
- B.
Kinetic to heat
- C.
Heat to kinetic
- D.
Chemical to sound
Correct Answer
A. Chemical to heatExplanation
In a car engine, the main energy transfer is from chemical energy to heat energy. This is because the engine burns fuel (which contains chemical energy) to produce heat energy through combustion. The heat energy generated is then used to power the engine and perform mechanical work.Rate this question:
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- 24.
Energy is the same thing as Power
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Energy and power are not the same thing. Energy is the ability to do work or cause change, while power is the rate at which energy is transferred or used. In other words, energy is a measure of the total amount of work done, while power is a measure of how quickly that work is done. So, while energy and power are related, they are not interchangeable and cannot be considered as the same thing.Rate this question:
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- 25.
If you increase the velocity of and object the kinetic energy will
- A.
Increase
- B.
Decrease
- C.
Stay the same
Correct Answer
A. IncreaseExplanation
When the velocity of an object increases, its kinetic energy also increases. Kinetic energy is directly proportional to the square of the velocity. This means that even a small increase in velocity can result in a significant increase in kinetic energy. Therefore, as the velocity of an object increases, its kinetic energy will also increase.Rate this question:
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- 26.
If you increase the mass of an object its potential energy will
- A.
Increase
- B.
Decrease
- C.
Stay the same
Correct Answer
A. IncreaseExplanation
Even though the potential energy of an object is equal to the weight multiplied by the height of the object, weight is related to mass. As the mass increases, the weight will also increase. All of those factors increase the potential energy.Rate this question:
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- 27.
Energy and work are related
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Energy and work are related because work is the transfer of energy from one object to another. When work is done on an object, energy is transferred to that object, causing it to gain energy. Similarly, when work is done by an object, energy is transferred from that object to another, causing it to lose energy. This relationship between energy and work is a fundamental principle in physics and is described by the work-energy theorem, which states that the work done on an object is equal to the change in its kinetic energy. Therefore, the statement "Energy and work are related" is true.Rate this question:
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Oct 20, 2011Quiz Created by
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