Key Concept
#1
the movement of energy can be tracked by observing the changes the energy causes to matter
#5
There are different types of light that can change a material in different ways
#9
Light travels in a straight line
reflect
to bounce off with out absorbing (noun form: reflection)
light source
an object that emits light
#2
Light carries energy that causes materials to change
#6
A light source can emit more than one type of light
#10
When a light wave hits a material, the light can be absorbed by the material, transmitted through the material, or reflected off the material.
transmit
to pass through (noun form: transmission)
emit
to give off
#3
When light hits a material, the material can absorb energy from the light
#7
Different types of light have different wavelength
#11
A material transmits or reflects some types of light and not others
light
a type of wave that carries energy from one place to another, even through empty space
absorb
to take in (noun form: absorption)
#4
#8
A material absorbs energy from some types of light and not others
#12
When light is transmitted through or reflected off a material, the energy is not absorbed, so the material does not change.
wave
a pattern that describes how energy is carried from one place to another
visualize
to form a mental picture of something that cannot be seen