Energy and Sound Flashcards
What’s measured in?
Joules or kilo joules
Definition of energy
Energy is the ability to do work
Name all the forms of energy
Kinetic, potential, nuclear, heat , light , electrical, sound , chemical , magnetic
Law if conversion
Energy cannot be created or destroyed but it can be changed from one form to another
Non renewable and renewable sources study from copy
Okay
Converting electrical to magnetic to kinetic energy
- nail
- paper clip
- wire
- battery
Electrical energy is converted to magnetic in the nail and the movement of the paper clips shows magnetic changing to kinetic energy
Converting light to electrical to kinetic
- solar cell
- lamp
- morse
- fan
The light energy is converted to electrical in the solar cell, the electrical is converted to kinetic in the moving fan
Converting chemical to electrical to hear energy
•bulb •wires • thermometer • battery
The battery converts to chemical energy to electrical. The electrical was converted to heat because the thermometer level rised
Sound is a form of ________
Energy
Sound is made by ___________________
Vibrations of particles
Sound needs a _______ to travel
Medium
What does sound must travel through
Gas liquid or solid
The loudness of sound is measured in ________
Decibels
Hearing protection should be worn for sound over _____ decibels
70
Echoes are formed when ______ ______ off ____ _________
Sound reflects off a surface
