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Light and Sound

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Are you looking for some great light and sound activities to go along with your science unit? Look no further. Try implementing some of these great ideas.
light and sound
Posted by:S. #67539

I use a student text book with some good ideas. Some things we do in fourth grade are:

light - flashlight and mirror experiments to see how light reflects, testing materials to determine whether they let light through (opaque, etc.), kaleidoscopes from film canisters and microscope slides

sound - make a simple tuned musical instrument with rubber bands (or could be more complex), getting everyone to hold a ruler over the desk edge a different length and then "playing" them in order to make a song (cool!!), using a tuning fork to show vibrations

When I taught eighth grade optics, we did other things that I can't recall TOO well, but I remember designing a floor plan for a funhouse with a cashier in the middle and say 10 arcade machines and you had to put mirrors in so that the cashier could see every exit and arcade machine....

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light and sound
Posted by:Angie #69700

One activity I've done with students is to take an empty xerox box and line the bottom with different boxes that create an ocean floor. The lid of the box is covered with a grid. Using a skinny dowel rod students measure the distance of the depth(sonar). They graph it and then using clay recreate the way they think the ocean floor appears according to the data. Have students create periscopes to view around a corner.

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Posted by:Lisa in FL #12389

Hi Jennie,

I'm doing a unit on Light and Sound for 4th grade next month. We aren't getting into heat much. Here are some of the things that I'm doing for light:

*using prisms and a white sheet of paper to discover how white light breaks up into colors.(outside, & you need a sunny day) I'm trying to get one prism for each group of 4.

*shining light from a flashlight through different filters (colored cellophane in layers workds) onto colored construction paper to find out what colors it makes

*using rope to demonstrate a light wave's motion (energy waves are in our 4th grade state expectations, it's probably a little advanced for 3rd)

*learning translucent, transparent, and opaque using wax paper, plastic wrap, and aluminum foil

*experimenting with curved mirrors-- I have a little bendable...

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light activities
Posted by:Cheryl #14856

Hi...I teach grade 4 too and we are learning about light right now...a couple of experiments that we did are:
... secret messages...have students write a message then using red, cover what they a red acetate over the message and when you shine a light on it you can read the message
...put a quater inside a pan...students stand back until they can not see the quater...add water to the pan...the quater is now visible
...using green, blue and red acetates shine a light through each one on a white piece of paper...when you overlap them white light appears
...using the primary colours of light you can create the secondary colours.
Hope this helps!

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Posted by:Julianne #14855

One I've done with various age groups shows how light can be scattered as it hits particles such as pollution. Fill a large glass jar with water. Shine a bright flashlight through the water from one side. The light will appear white. Now add milk a few drops at a time and watch what happens to the light. You can look at it from the sides of the jar or straight on. The particles of milk separate the shorter blue and green light rays from the longer orange and red ones.

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white light
Posted by:tracy #67391

this is one that always fascinates my 6th graders. to illustrate that white light is indeed made up of all of the colors of the spectrum i have them make up color wheels. i have a w.s. for this, but it can easily be done without it. draw 2 circles, approx 4" in diameter and divide them into 6 equal sections. (like old fashioned toy with disk spun around strings...i don't know how else to explain it)

have students lightly color each section using red, orange, yellow, blue, green, and violet.

glue the pieces, color sides out, to a posterboard and poke 2 holes near the center.

thread string through the holes, making one large loop with the wheel in the center.

put index fingers into loops on either end of the string and twirl the wheel around until the string will double up on itself.

pull string outwards, then...

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Light Experiment
Posted by:scotiateacher #141143

Latitude 101
Here is a simple light experiment that has always worked . I talk a little about how the eye and a camera works. I usually put a diagram on the board of the light passing through the lense and focusing upside down on the back of the eye or the camera film (light sensitive plate on digital camera). I then pass out magnifying glasses and a sheet of paper. We focus the overhead classroom lights on the paper. The students enjoy this but the best is yet to come. We turn out the classroom light and move to the windows. This time when we focus the light we can see that the images are upside down.

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Light is fun to teach
Posted by:Homeschl Mom #141144

When we studied light two years ago with some friends, we just got some light from the library and what we walked away with was what I call "the three B's:"

1. You can block it. Play with shadows. Use opaque things, and things like wire window screens.

2. You can bend it. Use a prism.

3. You can bounce it. Use a mirror and have the kids direct a flashlight beam, "bounced" by a mirror, on the clock, the doorknob, etc.

After the three b's have fun learning about the speed of light. It takes about 8 mins. and 20 seconds for light to travel from the sun to the earth. Don't tell how long it takes, but tell the students that you will start a timer when you say "go" and you want them to guess when the light that left the sun on the word "go" will hit the earth....

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Posted by:Lorelei #141145

I have to teach that light travels in a straight line until it hits an object in which it is either absorbed, reflected or refracted. I show that light travels in a straight line by getting 4 different index cards and putting a hole in the middle of the 1st three. Then you line up the cards and shine a flashlight on the holes. The light should go though the wholes and hit the last card. Then we take one of the cards and move it so that the light will be absorbed. This is an investigation from my textbook.

The kids LOVE to see reflection. I normally take the kids to a bathroom that we can turn off all the lights and it has a mirror. I shine a flashlight into the mirror and have the kids find where the light BOUNCES (or reflects) onto the wall. Then...

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more regarding tuning fork...
Posted by:Kat's Mom #141147

To bounce off Azure's suggestion, a tuning fork can be tons of fun. My kids always enjoy me striking it, getting one of them to hold a full glass of water, and then sticking the tuning fork in to show that the sound waves travel (and splash!) in water very well. It is also fun to experiment with the tuning fork on the end of a plastic cup or the garbage can to show how a megaphone works.

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simple sound wave demonstration
Posted by:Kat's Mom #141146

I like to bring in a big kettle, cover the top tightly w/ aluminum foil and sprinkle salt on it. We then use different items, ie., banging a pot lid with a spoon, a volunteer screamer, a whistle, etc., and I have the children make that noise close to the salt to watch it "dance". This is an excellent visual to prove to them that sound waves may not be visible, but they are moving nonetheless.

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Posted by:muffy #90949

Here are a few ideas:
Put rice on the speaker of a CD player or radio. They bounce all around.
The next activity is a lot of fun. I think I got it from AIMS. You draw a lion's head. Run off on oaktag. Cut out, and where the mouth is cut a circle the diameter of a styofoam cup. Put a string in the middle of the cup and leave about 8-10 inches.Tie the end to a paper clip so it doesn't slip out. Then put the cup into the hole. When you pull the string between your thumb and first finger it does sound like a "roar". I always try it before I put it in the lion and the kids can't hear it. But when it is in the lion they can hear the roar. When you put the string in the cup the string should hang...

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Unit on Sound
Posted by:Christian J #35590

Hello, I teach 4th grade, this is my first year.....when i student taught last unit was on sound. These are some things i used.
I took them outside and sat them down for 10 minutes and just had them listen. Then bring them inside and let them listen. Then brainstorm on the board what they heard out and inside. You can do a KWL chart on sound to begin. You can find an alarm clock and put it inside a coffee can, a cardboard box, a plastic them that sound travels through some objects. Make a paper cup telephone......describe the MAIN parts of the ear....second graders wont need all the parts. Take a ruler and place it at different areas hanging off the desk, then pull and let it them that because of the different lengths it makes a...

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Sound & Vibration
Posted by:Sound & Vibration #92832

Hold class outside. Using a clipboard, have the student write down every sound that they hear in fifteen minutes. Then go back into the classroom, form several small groups to make a master list on chart paper, then have the groups share with the class.

You could also assign small groups of students and have them write down only sounds they hear or know of that only animals make, humans make, machines make, etc. Or assign this as a homework activity: What sounds can you hear from your bedroom window?

Then, do a science lab about the ear drum and sound vibrations using a toilet paper tube, waxed paper and a rubber band, or put a broken rubber balloon on the tube and blow against a sunlit wall to see the vibrations. Use a slinky to demonstrate how sound travels. Do an experiemnt on how sound...

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My favorite sound activity
Posted by:Suezie #110141

You need: 1 metal clothes hanger (no plastic coating), two pieces of string about 2 to 3 feet long, pencil

Tie a loop at the end of each piece of string large enough for an index finger to fit in to

Tie the other end of each string to the bottom corners of the metal clothes hanger.

Put an index finger in each loop and suspend the clothes hanger above the floor (yes, the clothes hanger is now up-side-down)

Have a partner tap the clothes hanger once with a pencil. Note the sound.

With the loops still on the index fingers, put your fingers in your ears. The clothes hanger should still be suspended above the ground.

Have the partner tap the clothes hanger again. Note the difference in sound. I love the expression on the children's faces.


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