Energy Review
Explain the difference between kinetic and potential energy.
Kinetic energy is energy of MOTION.
Potential energy is stored energy in an object that is not moving.
Identify two things that can cause KE to increase.
Increase in speed (velocity).
Large mass
Identify two things that affect gravitational potential energy.
Height
Mass
REVIEW:
KINETIC OR
POTENTIAL ENRGY?
If both of these balls are traveling down a bowling lane at the SAME speed, which one would have more kinetic energy? Support your answer.
Ball A because it has greater mass.
Which skier will have a greater potential energy? Support your answer.
Skier 1 because skier 1 has greater height.
At which two points on the pendulum, is the pendulum experiencing the greatest potential energy?
A and D
Which of the following is an example of kinetic energy?1. A car not moving2. Water falling off a dam3. A rock resting on a ledge4. A person sitting in a chair
Which of the following increases when a metal spring is stretched horizontally?1. Potential energy2. Kinetic energy3. Gravitational potential energy4. Electrical energy
What happens to the kinetic energy and gravitational potential energy of a ball during free fall?1. GPE and KE both increase.2. GPE and KE both decrease.3. GPE decreases and KE increases.4. GPE increases and KE decreases.
Identify the source of energy used (mechanical, thermal (heat), electrical, chemical, nuclear)1. Moving river water2. Food3. Lightening4. Produced as a result of friction5. Oven6. Roller coaster7. Battery8. Hot iron9. Coal10. Stored in an atom’s nucleus
MechanicalChemical
ElectricalThermal
ThermalMechanical
ChemicalThermal
ChemicalNuclear
A bicycle rider ate breakfast before the ride. Which energy transformation occurred during the bike ride?1. Kinetic to chemical energy2. Chemical to kinetic energy3. Kinetic to nuclear energy4. Nuclear to kinetic energy
A song is playing on the radio. Which best describes the change in the flow of energy?1. Electrical energy light energy2. Electrical energy sound energy3. Sound energy light energy4. Sound energy electrical energy
Which device produces mechanical energy?1. A battery2. A light bulb3. An electric motor4. A solar cooker
Explain the difference between renewable and nonrenewable resources.
Renewable resources are energy sources that can be replaced as quickly as it is used.
Nonrenewable resources cannot be replaced by natural processes as quickly as they are used.
Identify some types of fossil fuels.Natural GasPetroleumCoal
Identify the following energy sources as renewable or nonrenewable. 1. Solar2. Natural Gas3. Geothermal energy4. Wind5. Hydroelectricity6. Fossil fuels7. Coal8. Biomass9. Petroleum
RenewableNonrenewable
RenewableRenewable
RenewableNonrenewable
NonrenewableRenewable
Nonrenewable
Describe the advantages and disadvantages of nuclear energy.
Advantages:• Power plants could still produce electricity after coal
and oil become scarce
• Do not produce air pollutants & CO2
Disadvantages:• A meltdown can cause a nuclear explosion that
releases radiation into the environment• Water used to cool power plants are dumped into
rivers and streams kill organisms
Describe the advantages and disadvantages of wind energy.
Advantages:• Does not burn fossil fuels• No pollution• Low costs
Disadvantages:• No wind no energy
Describe the advantages and disadvantages of solar energy.
Advantages:• Does not burn fossil fuels
• Do not produce air pollutants & CO2
Disadvantages:• Expensive
Describe the advantages and disadvantages of hydroelectricity.
Advantages:• Does not burn fossil fuels
• Do not produce air pollutants & CO2
Disadvantages:• Habitat destruction
Describe the advantages and disadvantages of geothermal energy
Advantages:• Does not burn fossil fuels
• Do not produce air pollutants & CO2
Disadvantages:• Not all areas are suitable for geothermal energy.• High startup costs.
Describe the advantages and disadvantages of biomass.
Advantages:• Does not burn fossil fuels• Fuels produced by biomass are clean-burning.• Available throughout the world.
Disadvantages:• Expensive to build biogas plant. • Biogas plants require space possible habitat
destruction.