Energy Transformations
What is an energy transformation?
An energy transformation is the process or flow of changing one form of energy to another.
What is potential energy?
Stored or energy or energy held in readiness.
Energy that is in motion.
What is thermal energy?
The energy that is generated by a source and measured by heat. Energy in the motion of atoms (heat).
What is the difference between potential and kinetic energy?
The difference between potential and kinetic energy is that potential energy is stored energy or energy held in readiness. Kinetic energy is energy that is in motion
What is not an example of chemical energy? Choose the following answer.
A. Batteries
B. Explosives
C. Food
D. Burner on a Stovetop
D. Burner on a Stovetop
Why? The Burner on a Stovetop produces thermal energy not chemical energy.
What are the three types of potential energy?
The three types of potential energy are gravitational, chemical, and elastic potential energy.
When will an object have the most kinetic energy?
An object will have the most kinetic energy when it is moving the fastest.
What are the three types of thermal energy?
Conduction, Convection, and Radiation.
An alarm clock begins to beep and the radio turns on. The display shows it is 9:00 a.m. What are the energy transformations?
Electrical --> Sound
What are the energy transformations of plugging in a fan to cool you off after a hot sunny day?
Electrical-->Mechanical
(1) Haley is playing baseball with her friends. (2) She is waiting for the ball to come so she could catch it. (3) Once she has gotten the ball, she is getting ready to throw it to her friend. Is sentence 3 showing potential energy? If, explain.
Yes, sentence 3 is showing potential energy because Haley is about to throw the baseball, the baseball is not in the air yet or she hasn't threw it yet to her friend.
Josiah is standing in a line to wait for the Apple Store to open so he could get the new iPhone 15. Right now its, 7:30 a.m. The Apple Store opens at 8:00 a.m. Currently, Josiah is waiting at the back of the line. Is this example kinetic energy? If not, explain.
This example is not kinetic energy, it is potential energy. Josiah will be standing in the line, still, until 8:00 a.m., that's when the Apple store opens and the line will start moving.
When you heat up your food in the microwave, what type of thermal energy is happening?
Thermal Energy: Radiation
Label which examples are potential (P) and kinetic (K) energy.
A. Bow drawn back.
B. Bow released.
C. Diver on diving board.
D. Apple.
E. Throwing a ball.
F. Rotating fan.
G. A dam holding back water.
A. Bow drawn back. (P)
B. Bow released. (K)
C. Diver on diving board. (P)
D. Apple. (P)
E. Throwing a ball. (K)
F. Rotating fan. (K)
G. A dam holding back water. (P)
What is the best scenario for this energy transformation? Electrical-->Light/Thermal
A. Using a flashlight
B. Turning on your cell phone
C. Lightning that struck a tree
D. Lighting up a candle with matches
C. Lightning that struck a tree
Label which examples are gravitational (G), chemical (C), and elastic (E) potential energy.
A. Holding a rock on top of a hill.
B. Stretching a rubber band.
C. Food
D. Explosives
E. About to shoot a rock with a slingshot.
F. A ball about to be thrown from the balcony.
G. Batteries
A. Holding a rock on top of a hill. (G)
B. Stretching a rubber band. (E)
C. Food (C)
D. Explosives (C)
E. About to shoot a rock with a slingshot. (E)
F. A ball about to be thrown from the balcony. (G)
G. Batteries (C)
A skier is going skiing down a snowy mountain. At which point, will the skier have the greatest kinetic energy?
A. At the top of the mountain.
B. At the middle/slanting part of the mountain. When the skier is traveling down to the bottom.
C. At the bottom of the mountain.
D. At the peak of the mountain.
B. At the middle/slanting part of the mountain. When the skier is traveling down to the bottom.
Label which examples are conduction, convection, and radiation.
A. Touching a pot of boiling hot water.
B. Warming your food next to the fire pit.
C. Currents.
D. Getting your skin tanned at the beach.
E. The sun transferring heat to the Earth.
F. The heat transfer of a stove.
G. Ironing your clothes.
A. Touching a pot of boiling hot water. (Conduction)
B. Warming your food next to the fire pit.
(Radiation)
C. Currents. (Convection)
D. Getting your skin tanned at the beach.
(Radiation)
E. The sun transferring heat to the Earth. (Radiation)
F. The heat transfer of a stove. (Convection)
G. Ironing your clothes. (Conduction)
Match which facts are conduction, convection, and radiation.
A. Can travel through space and other types of matter.
B. Solids are good conductors of heat, particularly metals. When you touch a solid with your hand, the heat will conduct that energy from the object to your hand.
C. Hot Liquid/Gas rises while Cold Liquid/Gas sinks.
A. Can travel through space and other types of matter. (Radiation)
B. Solids are good conductors of heat, particularly metals. When you touch a solid with your hand, the heat will conduct that energy from the object to your hand. (Conduction)
C. Hot Liquid/Gas rises while Cold Liquid/Gas sinks. (Convection)
What are the energy transformations for a burning candle?
Chemical Energy (Wax as the fuel) --> Thermal Energy (Burning wick) --> Radiant/Light Energy (Light coming from the candle)
Define gravitational, chemical, and elastic potential energy.
Gravitational Potential- Energy stored in an object due to its position
Chemical Potential- Energy stored in atoms and the chemical bonds between them
Elastic Potential- Energy stored when materials stretch or compress
Pick which of the following examples below is kinetic energy.
A. Ball rolling down a hill.
B. Flowing water.
C. A boy about to throw a ball.
D. Food.
E. A person driving a car.
F. Rubber bands.
G. A kid playing with a kite.
Correct Answers:
A. Ball rolling down a hill.
B. Flowing water.
E. A person driving a car.
G. A kid playing with a kite.
Define conduction, convection, and radiation.
Conduction is the direct transfer of heat from one object to another by contact.
Convection is the transfer of heat through warm molecules rising, and cooler molecules sinking.
Radiation is the transfer of heat by electromagnetic waves.
Radiant energy (sun) --> Chemical energy (grass/photosynthesis) --> Mechanical energy (deer moving from the grass it ate)