Docstoc

LIGHT ENERGY COLOR

Document Sample
LIGHT ENERGY COLOR Powered By Docstoc
					      Unit Overview
•Energy in Different forms
•Traveling Heat
•Why are you taller than me?
•Color Matters
•Do you see what I see?
•Scavenger Hunt
What is Energy?
• Energy is the ability to do work. There are different
types of energy forms that are either potential or
kinetic energy.

Potential Energy:
• Potential Energy comes in forms that are stored.
      ie. Chemical & Mechanical Energy
Kinetic Energy:
• Kinetic Energy forms are doing work.
      ie. Electrical, Heat, Light and Sound Energy.
What are some different forms of Energy?
• Mechanical Energy- is the sum of both kinetic and potential energy.
       I.e. running, lifting weights, pushing a car e.t.c

• Light Energy- is a form of energy that travels in waves.
         I.e. lit candle, light bulb, the sun e.t.c

• Sound Energy- is created when a wavelength travels
through solid, liquid or gas and creates various
 frequencies.
         I.e. beating a drum, playing a flute, e.t.c

• Heat Energy- is the flow of energy from a warmer
 object to a cooler object.
         I.e. heater, sun rays, fire e.t.c
                      Heat Transfer




      Radiation         Convection               Conduction


                                              The handle
Heat        Heat        Ice-                               Getting
                                   Ice        of a spoon
energy      emitted     cream                 heating up
                                                           burned
                        melting
                                   melting                 from
emitted     from a                 in hot     when
                                                           touching
                        on a hot              placed
from the    light                  liquids.                a hot
                        day.                  inside hot
sun.        bulb.                             soup.
                                                           stove.
How are shadows created?
• A shadow is created when light is                      The length of my shadow throughout the day.

blocked by an object. If an object is              60
opaque or translucent, light is unable             50
                                                            54                                              52
                                                                     48
to pass through and a shadow is                    40
                                                                                                    46




                                          Inches
                                                                            36
created.                                           30
                                                                                            34
                                                                                    25
Why is the size of your                            20
                                                   10
                                                                                                                 Height of
                                                                                                                 Shadow


shadow affected by a lights                        0

distance?
                                                        9 a.m    10 a.m 11 a.m 12 p.m    1 p.m   2 p.m   3 p.m
                                                                                 Time

• The closer an object is to light,
the taller the shadow, and the
                                           This graph shows the shadow of a student
further away an object is to light, the    who measures 48 inches in height
shorter the shadow.                        throughout the day.
       Does Light Have Color?
White light is made of color. It is made up of a mixture of the seven colors of the
                                      rainbow.

  A prism can separate white light into a group of colors called the spectrum.
       WHAT MAKES A RAINBOW
• A rainbow is an arched light that is separated into bands
  of color stripes. It appears when the sun’s rays are bent
  and reflected by drops of rain.

• Immediately after a rain shower, thousands of water
  droplets are left floating in the air. As sunlight passes
  through these spherical droplets, light is bent and
  scattered into a continuous band of colors.

• This light is reflected off the back of the raindrop and
  refracted again as it leaves the drop.

• The light coming from several of the raindrops creates a
  rainbow.
          Does color matter?
• Have you ever thought about why people
  wear dark colors in winter and light colors
  in the summer?

• Dark colors absorb light. Absorbing light
  makes dark colors warmer.

• Light colors reflect light so they are cooler.
                                  ROY G BIV Song by Mr. Ray
                                                    http://www.youtube.com/watch?v=wfIgC_PRTVc


•   ROY G BIV

    chorus
    I know a boy named Roy G Biv
    Up in the sky is where he lives
    His name stands for the colors of the rainbow
    This is the story of Roy G Biv

    Red is the color of the bouncing ball
    We play with every day
    Orange is the color and the name of
    The juiciest fruit I know

    repeat chorus

    Yellow is the color of the smiling sun
    Keeps us warm with it’s loving rays
    Green is the color of the nice, soft grass
    In the summer when we play

    chorus

    Blue is the color of the great big sky
    Where all the birds fly above
    Indigos’ the color of the nighttime sky
    Where all the twinkling stars put on a show
    Violet is the color and the name of
    The prettiest flower i know

    last chorus
    I know a boy named Roy G Biv
    Up in the sky is where he lives
    His name stands for the colors of the rainbow
    That was the story of Roy G Biv
What is light? What makes a rainbow?
Go to http://www.kidsbuilder.com/FunFactsForKids/light.html
to find out.

What is Energy? List three forms of energy with
examples.
Go to
http://www.childrensuniversity.manchester.ac.uk/interactives/science/energy/whatisenergy.asp
to find out.

Name the colors of the color spectrum in order. What color absorbs the most heat? Least
heat? Why?
Go to http://library.thinkquest.org/28160/english/color/color.html to find out.

                                 Filamentality Site:
                  http://www.kn.att.com/wired/fil/pages/listlightean.html
How is a shadow created? When is your shadow the longest?
Shortest? Why?
Go to
http://www.bbc.co.uk/schools/ks2bitesize/science/physical_pr
ocesses/light_shadows/read1.shtml
to find out.

List and define three ways heat can be transferred from one
object to another.
Go to
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/light_l
essons/thermal/transfer.html to find out.

                                  Filamentality Site:
                   http://www.kn.att.com/wired/fil/pages/listlightean.html

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:6
posted:7/28/2012
language:English
pages:12