Energy
The universe consists of these two things: matter and _______.
_______ also is responsible for every movement and change in the universe.
What is energy?
The total energy associated with the random motion of particles in matter is called _____
What is thermal 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?
As an object gets hotter, the particles _____ _____.
move faster
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.
As an object gets cooler, the particles in it _____ _____.
The transfer of thermal energy through solids touching is called _________.
What is conduction?
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.
What has more thermal energy, and why?
Water from a lake at 77 degrees F, or water from a hot cup of tea?
The Lake water, because it has a lot more mass.
The transfer of energy by waves is called ____________
What is radiation?
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.
_______ is a measurement of the average amount of thermal energy an object has, and it is measured using a____________.
Temperature is measured using a Thermometer.
The transfer of thermal energy in fluids (liquids and gases) is called __________. And explain how it works.
Convection: heated material rises due to decreased density and sinks when it cools, this causes a convection current.