Types of Energy
What is kinetic energy?
The energy of motion.
What does the Law of Conservation state?
Energy cannot be created nor destroyed. It can only be transferred or transformed.
What is a wave's amplitude?
The height of a wave. It shows how much energy it has.
What energy transformation occurs when you turn on a light bulb?
Electrical energy transforms into light and heat.
When electromagnetic energy is used to heat up food, what type of wave is that?
Microwaves!
What type of energy does a rock have when it is sitting at the top of a hill?
Gravitational Potential Energy
When a car slams on the brakes, where does the car's kinetic energy go?
It transforms into heat via friction, as well as sound.
What is the frequency of a wave?
The number of waves that pass a point per second.
Describe the energy transformation in a gasoline-powered car engine.
Chemical energy in the gasoline is transformed into thermal and kinetic energy.
Explain how energy transforms in making a wind turbine produce electricity.
Mechanical energy from the wind transforms into electrical energy as the propellers spin.
Name two types of potential energy.
Possible Answers Include:
Gravitational, Chemical, Elastic, and Nuclear
When a candle burns, the amount of wax seems to get smaller and smaller until the candle disappears.
Describe what happened to the candle using the conservation of energy.
The chemical energy stored in the wax was transformed into light and heat. When all the energy was used up, the candle was gone.
What is the relationship between wavelength and frequency?
They are inversely related. As wavelength increases, frequency decreases.
Describe how energy transforms when using a battery-powered flashlight.
Chemical energy in the battery transforms into electrical energy, and then into light and thermal energy.
How is energy transformed in a toaster?
Electrical energy transforms into thermal energy to heat up bread.
Name ONE way Chemical Potential Energy and Gravitational Potential Energy are SIMILAR, and ONE way that they are DIFFERENT.
Similar:
Different:
SIMILAR: Both are stored energy.
DIFFERENT: Chemical Energy is stored in chemical bonds, and Gravitational Energy is based on position.
Describe what happens to the energy in a pendulum as it swings.
Gravitational Potential Energy is transformed into Kinetic Energy, and then back into Gravitational Potential Energy.
Name two types of waves in the electromagnetic spectrum
Possible answers:
Radio waves, microwaves, infrared waves, visible light, ultraviolet light, X-rays, Gamma rays
Describe the energy transformation that happens when you eat food and then go for a run.
Chemical energy in the food transforms into kinetic and thermal energy in you.
Describe how energy transforms in a hydroelectric dam.
Gravitational potential energy of water is converted into kinetic energy as water flows, which then transforms into electrical energy through a generator.
Describe a scenario where an object can have Kinetic Energy and Potential Energy at the SAME TIME.
Lots of possible answers...
Example: A ball falling off a shelf has kinetic energy because it is moving, but it also has potential energy because it is still high up.
How does the Conservation of Energy apply to how your phone and its battery work?
Chemical Energy stored in the battery is transformed into light, sound, and even heat, and when the chemical energy runs out, the phone no longer works.
Explain the difference between transverse and longitudinal waves.
Transverse: Particles move perpendicular to wave.
Longitudinal: Particles move parallel to wave.
Describe the energy transformation that occurs in photosynthesis.
Solar (light) energy is transformed into chemical energy stored in the plant.
Describe the energy transformations that occur in an ecosystem starting from sunlight reaching a plant to that animal eating the plant.
Solar energy is transformed into chemical energy through photosynthesis in the plant. When an animal eats the plant, the chemical energy is transferred to the animal.