Science vocab Flashcards
(20 cards)
What is energy?
The ability to do work and to cause change.
What is kinetic energy?
The energy an object has because of its motion.
What is potential energy?
The energy stored by an object as a result of its position.
For example, a roller coaster at the top of a hill has potential energy.
What is thermal energy?
Heat energy produced when the molecules of a substance vibrate.
What is chemical energy?
The energy stored in the chemical bonds of molecules released during a chemical reaction.
For example, a car engine uses chemical energy stored in gasoline, and moving people use chemical energy from food.
What is light energy?
Visible light energy or light bulb energy.
What is sound energy?
Audible energy.
For example, when you talk, play musical instruments or slam a door, it releases sound energy.
What is electrical energy?
Electrical energy exists when charged particles attract or repel each other.
For example, television sets, computers and refrigerators use electrical energy.
What is nuclear energy?
Energy created by vibrating particles that create waves that travel through space and time.
What is mechanical energy?
Energy of motion and position of an object (potential energy + kinetic energy).
What is electromagnetic energy?
Energy that travels in waves; have electrical and magnetic properties.
What is the Law of Conservation of Energy?
States that energy is never created or destroyed, it just changes its form.
What is a generator?
Converts mechanical energy into electrical energy.
What is temperature?
A degree of hotness or coldness that can be measured. It is how fast the atoms and molecules of a substance are moving.
What is conduction?
The transfer of heat by direct contact (particles collide).
What is radiation?
Heat transfer through space by electromagnetic waves.
What is convection?
The flow of currents in a liquid or gas.
What are thermal conductors?
A material that easily transfers heat.
What are thermal insulators?
A material that does not easily allow heat to pass through.
What is combustion?
A chemical reaction that produces heat and light.
