Are you interested in doing more science activities in your classroom? Here's where I'm posting my newest activities....
The future of motors is brushless. Lets's start teaching them. Materials 5/16 inch carriage bolt or other full thread bolt about 3 inches long 6 5/16-inch nuts 3/4 inch square of wood or plywood approximately 4 inches x 4 inches 5/16 inch drill bit 1 inch Forestner bit (or alternatively rubber feet) Hammer Plastic bobbin like this Enamelled magnet wire (something around 28 to 30 gauge is fine)…
Some seemingly innocuous things (like lemon scent) under the right conditions can seriously hurt indoor air quality through the creation of particulates. This activity shows their creation and allows you to measure them in a variety of conditions. Materials SEN 66 Air Quality Measuring Device developed by the Teacher Institute Concentrated lemon scented cleaning product like Simple Green Lemon…
Building HVAC is starting to use more and more sensors to improve ventilation, and the air quality sensor companies are developing cheap sensors that can take good enough data. Though not research grade, they have the advantage of being cheap (less than US$100), making them well suited for the science classroom. Materials SEN-66 sensor This sensor detects CO 2 , PM 2.5 (and other ranges),…
The new Raspberry Shake seismograph materials and software use a device called a geophone to measure the earth's vibration. Typically these are made by allowing a coil of wire to vibrate near a magnet. Moving a coil near a magnet generates current in the wire. By measuring the amount of current in the wire you can measure how fast the earth is moving to determine the size of the vibration. The big…
See the Pen Untitled by Zeke Kossover ( @Zeke-Kossover ) on CodePen .
Recently taught a workshop about harmony and sound. Click here to see the slides.
Air is invisible, but that doesn't mean you can't see what's going on sometimes This is a stripped down version of Schlieren visualization, technically really just an advanced shadow, but it does reveal even small variations in the optical density of air. Wikipedia on Schlieren Materials 4 inch or larger (whatever you can afford) convex mirror for a Newtonian telescope like this one 6 inch…
Swear not by the inconstant moon. The moon changes it's shape in the sky, but the moon itself stays the same. How can this be? Materials black table tennis (Ping Pong) balls white table tennis ball push pin unfolded large paper clip table lamp without its shade bright bulb very dark room Construction Use the push pin to poke a small hole in black table tennis ball. Unfold the paper clip but leave…