Transcript Energy Review

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 moving
2. Water falling off a dam
3. A rock resting on a ledge
4. A person sitting in a chair
Which of the following increases
when a metal spring is stretched
horizontally?
1. Potential energy
2. Kinetic energy
3. Gravitational potential energy
4. 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 water Mechanical
2. Food Chemical
3. Lightening Electrical
4. Produced as a result of friction Thermal
5. Oven Thermal
6. Roller coaster Mechanical
7. Battery Chemical
8. Hot iron Thermal
9. Coal Chemical
10. Stored in an atom’s nucleus Nuclear
A bicycle rider ate breakfast before the
ride. Which energy transformation
occurred during the bike ride?
1. Kinetic to chemical energy
2. Chemical to kinetic energy
3. Kinetic to nuclear energy
4. 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 energy
2. Electrical energy  sound energy
3. Sound energy  light energy
4. Sound energy electrical energy
Which device produces mechanical
energy?
1. A battery
2. A light bulb
3. An electric motor
4. 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 Gas
Petroleum
Coal
Identify the following energy sources as renewable
or nonrenewable.
1. Solar Renewable
2. Natural Gas Nonrenewable
3. Geothermal energy Renewable
4. Wind Renewable
5. Hydroelectricity Renewable
6. Fossil fuels Nonrenewable
7. Coal Nonrenewable
8. Biomass Renewable
9. Petroleum 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.