Energy
The universe consists of these two things: matter and _______.
_______ also is responsible for every movement and change in the universe.
What is energy?
What is the process called when electrical energy is changed into light energy in a bulb?
Energy transformation or transfer
When a ball is dropped from a height, what type of energy does it have at the highest point?
potential energy
Matter is made of tiny particles that are constantly _______
What is moving?
Energy cannot be created or destroyed, but it can be ______.
What is transferred/converted?
Give an example of energy being transformed from chemical energy to thermal energy?
match burning
wood burning
...
What 2 types of energy are often a byproduct of energy transformations?
Heat & Sound
Madison flinging her pencil in the air is an example of ______?
What is kinetic energy?
What is the sum total of PE & KE combined called?
mechanical energy
Energy cannot be created nor destroyed, so all energy must come from somewhere. Explain the energy transfer that occurs in a light bulb, make sure to list all the energy types involved.
Electrical to Light and Heat.
What type of energy transformation occurs when you eat food and then run?
chemical to mechanical
When a flashlight is turned on, what energy transformations occur?
(Give all 3 energy types in the correct order)
Chemical to electrical to light
Give an example of Potential Energy.
various correct answers
Gravitational Potential energy is greater when an object is farthest from the ______'s _________.
What is the earth's surface?
Perpetual motion machines are devices that claim to make energy endlessly without needing any energy put into it. Why can they not be physically possible?
Because energy can not be created or destroyed, only converted. So the device could not make energy without putting energy into it.
Describe a scenario where kinetic energy is transformed into potential energy.
various correct answers
A student observes a pendulum swinging. Describe how energy is transformed as the pendulum moves.
Potential energy is highest at the ends, kinetic energy is at the lowest point
Explain from beginning to end the energy transfer of a gasoline powered generator. Also what wasted energy is created during this process?
Transfer: chemical (gas) -----> Mechanical (spinning) -----> Electrical
Wasted: Heat and sound
List at least 3 different types of Potential Energy, and list at least 3 different types of Kinetic Energy.
PE: gravitational, chemical, elastic, nuclear
KE: light, thermal, sound, electrical
What happens to the PE & KE as you go through a rollercoaster? Also mention what wasted energy occurs.
PE is converted to KE while going down.
KE is converted to PE while going up.
Some energy is wasted as heat and sound due to friction.
How does the transformation of energy occur in a hydroelectric power plant?
Gravitational Potential to Kinetic to Electrical
A scientist claims that energy was destroyed in a chemical reaction. Use evidence to explain why this claim is incorrect.
Energy is only transformed, not destroyed, according to the law of conservation of energy