1. is

2. Lightning Starlight Sunlight Bioluminescence Flame Glow worm Firefly
Jelly Fish
Flame

3. Electric bulb
Firework
Traffic light
Television

4. when they hit an object with a very smooth and shiny surface,
 The bouncing back of light waves
when they hit an object
with a very smooth
and shiny surface,
like a mirror

5. Refraction of Light
 The light changes speed/direction as it travels creating an optical illusion.

6. There are different colors of light because they are light waves
which have different wavelengths.
Red light has the longest wavelength
while violet light has the shortest wavelength

7. Diagram of a Wave
Wavelength
Crest
Amplitude
Equilibrium
Trough

8. Light travels in a straight line.

9. Allow all the light to pass through.
Clear Water
Clear Plastic
Clear Glass
Clear Air

10. Allow only some amount of light to pass through.
Wax Paper
Cellophane
Translucent Plastic
Frosted Glass

11. Do not allow light to pass through them.
Wood
Books
Rock
Metal

12. There are 3 kinds of Shadows
Dark
Faint
Lighter
Light is blocked by
opaque object
Light is blocked by
transparent object
Light is blocked by
translucent object

13. You can change the size of a shadow by moving your body or the object closer to or farther from the light. (Shadows grow bigger and fuzzier as the object moves closer to the light source, and smaller and sharper as the object moves farther away.)