1. By : Aja Howard and Jenna Altalibi
Light energy
By : Aja Howard and Jenna Altalibi

2. definition
Light is energy that travels in waves . You can see it.

3. Characteristics Travels in a straight narrow beam (ray)
Reflects or bounces off of things (light)
Different lengths of light make different colors (rainbow/refraction)

4. shadows Objects block light rays Change size by angle
“When the sun appears high in the sky the shadow is longer early or late in the day , when the sun appears lower in the sky.”
When the moon covers the sun it casts a shadow on Earth and it is called a solar eclipse.

5. The human eye
Iris can control amount of light that comes to the human eye
Pupil gets larger in dim light (dark) and smaller in bright light
Human eye sees things upside down but the brain is smart enough and turns it the right way

6. reflection Bounces off things
“light rays reflect differently off smooth and rough surfaces.”

7. refraction Light changes direction when goes through glass
Pencil placed in glass of water looks broken
Objects underwater look bigger than they are
Click play to watch video below

8. Transparent
Clear or see through
Eyeball has a transparent cover

9. Scatters light (blurry)
Translucent
Scatters light (blurry)

10. opaque
Absorbs light
Can’t see through it

11. Examples/usefulness Helps us live Helps plants grow O2 (oxygen)
Helps humans see

12. Manmade Lightbulbs Lanterns Lasers Microwave Lamp Flashlight
Lighthouse

13. nature
Fireflies
Fish
Fire
Rainbows
Sun
Stars

14. conclusion
Light energy is very important in many ways such as helping plants grow , helping everyone see , and help us live.

15. SOURCES WWW.pebblego.com WWW.pebblegonext.com WWW.mel.org
Bing images