Light & Energy
What is energy?
THE ABILITY TO MAKE THINGS MOVE OR CHANGE.
What does it mean to absorb?
TO TAKE IN ENERGY.
What is a wave?
A PATTERN THAT CARRIES ENERGY FROM ONE PLACE TO ANOTHER.
What is a light source?
AN OBJECT THAT GIVES OFF LIGHT.
In what direction does light travel?
IN A STRAIGHT LINE.
What is light?
SOMETHING THAT CARRIES ENERGY FROM ONE PLACE TO ANOTHER.
What is reflect?
TO BOUNCE LIGHT OFF A SURFACE.
Light is what type of energy transfer?
A WAVE.
What is emit?
TO GIVE OFF LIGHT.
]Can light travel through empty space?
YES, IT DOES.
How can we track the movement of energy?
BY OBSERVING CHANGES IT CAUSES TO MATTER.
What is transmit?
TO PASS THROUGH A MATERIAL.
What is a wavelength?
THE DISTANCE FROM ONE PEAK TO THE NEXT.
Why kind of rays does sunlight give off to affect skin differently than visible light?
UV LIGHT.
Why can we see objects?
LIGHT REFLECTS OFF OF THEM INTO OUR EYES.
What does it mean to visualize something?
TO FORM A MENTAL PICTURE OF SOMETHING.
Name the 3 things that can happen when light hits a material.
ABSORB, REFLECT, OR TRANSMIT.
Do all light sources emit the same type of light?
NO; THEY CAN EMIT DIFFERENT TYPES.
What role does melanin play in the skin?
IT ABSORBS UV LIGHT AND PROTECTS SKIN CELLS.
Why can some materials be seen through and others cannot?
SOME TRANSMIT LIGHT WHILE OTHERS ABSORB OR REFLECT IT.
Explain why light can cause changes in materials.
LIGHT CARRIES ENERGY THAT MATERIALS CAN ABSORB.
Why do some materials appear certain colors?
THEY REFLECT SOME WAVELENGTHS AND ABSORB OTHERS.
How do different wavelengths affect materials differently?
DIFFERENT WAVELENGTHS CARRY DIFFERENT ENERGY AND INTERACT DIFFERENTLY.
Why do some materials only absorb certain types of light?
DIFFERENT MATERIALS INTERACT WITH DIFFERENT TYPES OF LIGHT WAVES IN DIFFERENT WAYS.
Explain how light can cause skin cancer.
UV LIGHT IS ABSORBED BY SKIN CELLS, DAMAGING THEM.