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.