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

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

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

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.

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

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

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

Transparent Clear or see through Eyeball has a transparent cover

Scatters light (blurry) Translucent Scatters light (blurry)

opaque Absorbs light Can’t see through it

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

Manmade Lightbulbs Lanterns Lasers Microwave Lamp Flashlight Lighthouse

nature Fireflies Fish Fire Rainbows Sun Stars

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

SOURCES WWW.pebblego.com WWW.pebblegonext.com WWW.mel.org WWW.energystar.gov WWW.eia.gov WWW.discoveryeducation.com WWW.brainpop.com Bing images