Potential and Kinetic Energy
What type of energy does a stretched rubber band have before it is released?
Potential energy.
Which form of energy lets you see this sentence?
Light energy.
When you rub your hands together and they get warm, what energy transformation has taken place?
Mechanical energy (friction from rubbing) → thermal energy (heat).
A resource that can be used many times.
renewable resource
Name the energy an apple has while sitting on a table because of its position above the ground.
Potential energy.
What type of energy do your muscles use to move your body?
Mechanical (or chemical → mechanical) — muscles use chemical energy in food to produce motion.
A flashlight turns chemical energy in the battery into light. What other form of energy is usually produced as a side effect?
Thermal energy (heat).
What are the 3 types of fossil fuels
petroleum, natural gas, and coal
A bicycle moving down a hill has which type of energy because of its motion?
Kinetic energy.
When you plug in a lamp and it heats a light bulb slightly, two forms of energy are involved. Name both.
Light and thermal (heat).
A solar panel changes sunlight into electrical energy. Write that transformation in the format: (start → result).
Light energy → Electrical energy.
Nuclear energy relies on what element?
uranium
Explain in one sentence how potential energy and kinetic energy are related when a ball is dropped.
As the ball falls, potential energy decreases while kinetic energy increases
Identify the form of energy carried by an electric current through a wire.
Electrical energy.
Explain the energy transformations which occur within a car after it gets gas at the gas station.
Chemical → Mechanical → Electrical → heat - sound).
What does burning fossil fuels create?
Green house gases, CO2
A roller coaster at the highest point and then at the lowest point — identify which has more potential energy and which has more kinetic energy, and why.
Highest point: more potential energy; Lowest point (while moving fastest): more kinetic energy — because potential energy depends on height and kinetic on speed.
What type of energy is harnessed from water going over a dam? (Not the type of sewable resource but the exact type of energy)
mechanical energy
Explain how eating food can eventually power a light bulb in your home if the energy is used to run a generator through human work (describe the chain of energy forms).
Food (chemical energy) → chemical energy in muscles → mechanical work → mechanical energy turns a generator → electrical energy (simplified chain).
Name 5 types of renewable resources.
hydropower, geothermal, wind, solar, biomass/ biofuel