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Energy Voc. & Questi

Energy Vocabulary and Practice Problems

QuestionAnswer
MECHANICAL ENERGY the energy of moving objects (total PE + KE)
RADIANT ENERGY light energy in the form of electromagnetic waves
CHEMICAL ENERGY energy stored in the bonds between atoms and molecules
NUCLEAR ENERGY the energy stored in the nuclei of atoms
ELECTRICAL ENERGY the energy produced by moving electrons
THERMAL ENERGY the energy produced by moving particles (atoms and molecules )
ENERGY The ability to do work or cause a change
POTENTIAL ENERGY stored energy due to its position (height) or arrangement (molecular)
KINETIC ENERGY energy of motion
LAW OF CONSERVATION OF ENERGY Energy cannot be created or destroyed; energy can change from one form to another
ENERGY TRANSFORMATION A change from one form of energy to another
SOUND ENERGY Energy that is produced by vibrations (as longitudinal waves) through a medium.
What state of energy do the gears in a working watch experience? kinetic energy
What form of potential energy is stored in the gasoline in the tank of a car? chemical energy
What is the major form of energy produced by a star? nuclear
What form(s) of energy are produced by glow sticks? chemical and radiant
What form of energy is used and released during digestion of food? chemical, heat
What form(s) of energy are produced by a television? electrical, radiant, mechanical (sound) and thermal
What form of energy is produced by musical instruments? Mechanical (sound=vibrations)
A roller coaster will not make it over another hill or loop if it is as tall or taller than the initial hill. Why? Much of the PE changes to KE, but a small amount of PE changes to thermal and sound energies
Explain how jumping on a trampoline has 2 different kinds of PE. It has gravitational PE because the person jumps above the lowest point and has elastic PE whenever the jumper lands on the trampoline, stretching the material and springs.
Write an energy conversion chain for using a flashlight chemical (battery)-->electrical (wires/metal connectors)-->radiant (bulb)
Nearly every kind of energy transformation produces __ energy thermal
A pendulum ball will never be able to reach the height it was originally dropped from. Why? Much of the PE changes to KE, but a small amount of PE changes to thermal and sound energies
A bouncing ball is observed to bounce to lower and lower heights until it stops. Why didn't the ball keep bouncing? Much of the PE changes to KE, but a small amount of PE changes to thermal and sound energies
From which event did all the matter and energy in the universe come into existence? The Big Bang (approximately 14 billion years ago!)
What forms(s) of energy are produced by a fire? radiant, thermal and chemical energy are used and produced
What state of energy does a stretched elastic experience? potential energy
What state of energy does a skier standing at the top of a mountain experience? potential energy
Created by: jsolari