This week my 6th graders are learning about waves and wave behaviors. Rather than just talking about how waves interact and the different places we see effects of waves, I had them move around to different stations to actually SEE what happens.
I got the station ideas from the Coastal Carolina University website. The have a NSF Fellows Program that has many great lesson plan and activity ideas! You can look around here. The direct link to the lesson plan I used is here.
Students fill a pan halfway with water. They place blocks in the pan and use a dropper or ruler to make waves. Students then observe how the waves move. This station demonstrates diffraction – the waves spread and move around different barriers
This is the classic “broken pencil”. Students look at how the light travels at different speeds through different mediums, which is refraction.
Using two meter sticks as a track, students roll marbles and watch how they transfer energy, similarly to waves. It also demonstrates reflection of waves. This is very similar to a momentum activity I’ve done, which you can see HERE.
Shine a flashlight through tissue paper and watch what happens! Students look at how certain light waves with still come through and how others are absorbed. Light will also appear a different color!
Stretching out a slinky, students pull back a few rings, then let go to watch the wave! They time how long it continues to send the wave back and forth before stopping. This demonstrates wave reflection, but also how the energy is absorbed into their hands.
Students use a mirror and a flashlight to try and reflect the light onto the ceiling. Playing around with the flashlight can demonstrate how the law of reflection works. If you hold the flashlight at a larger angle, you can see that the light is reflected with the same angle!
Using ear cancelling headphones, or even just plain ear muffs, students noticed how much the sound waves are absorbed. Wearing the headphones muffles the sound quite a bit in a noisy classroom!
Cool shades! Putting on sunglasses demonstrates how certain materials will absorb light waves, making light appear dimmer with less glare.
Students enjoyed participating in the different activities. Afterwards, while discussing each station together, I had the students try to identify the wave behaviors they saw. They did pretty well, and now have these pictures in their heads to connect to the ways waves can react.
Now if only I could wear those noise cancelling headphones everyday…