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Nat Geo Science Energy: Chapter 7

Potential energy stored energy
Kinetic energy the energy of motion
Mechanical energy an object's potential energy plus kinetic energy combined
Chemical energy energy that is stored in substances, a form of potential energy
Energy the ability to do work or to cause a change in matter.
Law of Conservation of Energy energy cannot be created or destroyed
Sound energy Energy you hear caused by vibrations that travel in waves through matter
Vibration a back-and-forth motion of matter, movement causes vibrations
Volume loudness of the sound
Pitch describes how low or high a sound is
Frequency number of vibrations per second. High frequency equals high pitch, low frequency equals low pitch
Reflection of Sound sounds waves bouncing off of surfaces
Echoes reflected sound waves
Absorption of Sound sound waves going into materials
Decibels units used to measure sound (dB) Above 100 can cause pain & damage ear.
Reflection of Light light waves bouncing off objects
Refraction of Light light waves bend, or refracts, when it passes from one material to another because the speed of light changes.
Temperature the measure of how hot or cold an object is.
Heat Energy the energy of moving particles
Energy Transfer the movement of energy from one place or object to another
Energy Transformation change of energy from one form of energy to another
Solar energy energy from the sun in the form of heat and light. Radiant energy
Light Energy energy we see
Heat the transfer of thermal energy between objects with different temperatures
Conduction transfer of thermal energy from one object directly into another (two objects in contact -touch)
Convection transfer of thermal energy through the movement of a gas or liquid (heat rises)
Radiation transfer of energy by waves that move through matter and space (sun), does not need matter to travel
Conductor anything that allows thermal energy to move through it easily
Insulator anything that slows the movement of thermal energy
Created by: dabb