Science Study Guide
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23 Terms
What’s the difference between physical and chemical change?
Physical change only changes the form of a substance while chemical change forms new substances in the process.
What is kinetic energy?
it is the energy of matter in motion.
What is potential energy?
it is the energy an object has from its position.
What is chemical energy?
it is a from of potential energy that is stored in chemical bonds between atoms.
What is electromagnetic energy?
it is a from of energy that travels through space as waves.
Electrical energy
it is the energy of moving electrical charges.
What is thermal energy?
it is the total energy of all the particles in an object.
Electrode
it is a metal strip that conducts energy.
What is physical change?
It is a change in a substance that does not change its identity.
What is chemical change?
it is a change in which 1 or more substances combine or break apart to form new substances
What is law of conservation of mass?
it is the rule that energy cannot be created or destroyed.
Energy
it is the ability to do work or cause change.
Temperature
it is the measure of the average energy of motion of the particles of a substance.
What is endothermic change?
it is a change in which energy is taken in.
Exothermic change
it is a change in which energy is given off.
Example of thermal energy
A cup of hot cocoa radiating warmth to the air and your hands.
What is an example of kinetic energy?
A car driving on a highway.
Example of potential energy
A boulder on the edge of a cliff.
What is an example of chemical energy?
When you digest your food.
What is an example of electromagnetic energy?
Radio waves, microwave waves
What is an example of electrical energy?
Light bulbs, lightning
How do I know the difference between endothermic and exothermic on a graph?
Endothermic ends higher than when it started while exothermic ends lower than it started.
What is the difference between thermal energy and temperature?
Thermal energy is the total motion of particles while temperature is the average motion of particles.