main seg Flashcards
what is energy
The ability to do work
what are the different forms of energy
chemical, electrical, radiant, mechanical, thermal and nuclear
what are energy chains
mechanical machine that guides energy flow
what is sound energy
Sound is energy that we can hear. It is a type of kinetic energy that is made from the vibration of matter
what happens to sound waves when you change the pitch
The higher the frequency (shorter wavelength), the higher the pitch.
what happens to sound waves when you change the volume
the amplitude of the wave is increased
what is light energy
Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes.
what is the difference between reflection and refraction
Reflection is the bouncing back of light when it strikes a smooth surface. Refraction is the bending of light rays when it travels from one medium to another.
what is electrical energy?
the flow of electrons
what is the difference between current, voltage and resistance?
Voltage is the pressure that pushes current. Current is the rate at which charge is flowing. Resistance slows down and resists the flow of electrons/current
