Energy Flashcards
(22 cards)
what is energy
energy makes things happen
5 types of energy
Kinetic
Heat
Light
Sound
Electrical
what is kinetic energy
makes things move
what is heat energy
anything with heat eg. sun
what is sound energy
vibrations
what is electrical energy
energy that comes from power eg. solar panels, and batteries
Types of Heat Transfer
Conduction
Convection
Radiation
Conduction
when heat is transferred between 2 objects
Convection
Heat transferred between liquids/gases which causes heat to rise or spread
Radiation
when we can feel the heat but not touch it
what is energy transformation
energy be transferred from one type into another eg. microwave
the box sum:
input->useful->wasted
Gravitational Energy
energy stored in an object
chemical energy
stored in substances eg. battery
elestaic
stored in something streched or squashed
Nuclear energy
energy stored in particles that make up matter
example of an energy transfer
a high five
Energy transfer
when one energy is transferred to another
difference between energy transfer and energy transformation
energy transfer is the movement of energy from one to another. Energy transformation is when energy changes from one type to another.
Energy Effeicency
using less energy to get the same job done
useful energy vs wasteful energy
useful = the purpose
wasteful = what is not going towards the purpose
energy effciency sum
useful divided by total energy x 100
