Teacher Demo – Water Quality Demonstration

This demonstration shows some differences between potable (drinkable) water and non-potable (non-drinkable) water.  Variations in temperature, turbidity and pH level also determine the types of microorganisms that can thrive in each water sample.  Continue reading

Wrapper Worm – Sick Science! #175

You can have a ton of science fun with a straw. You can make it into a blow gun, using the properties of air, or it can double as a pipette when your lab has run out. But did you know you can perform some awesome hands-on science with the straw’s wrapper, too? It’s true. With the Wrapper Worm, we’ll reveal how to turn an ordinary straw wrapper into a growing worm!

SICK SCIENCE APPAREL NOW AVAILABLE! Click here: http://spanglersci.com/SickScienceApp…

Find out why this works here: http://www.stevespanglerscience.com/l…

Want more experiments like this? Check out http://www.stevespanglerscience.com/p…

The Toilet-Education Connection: What’s a toilet worth in Kenya?

Sanitation is a critical, yet often overlooked fundamental human right. This documentary, first in a series, broadly describes the worth of the sanitation-education connection in one area of Kenya, by defining its challenges and presenting solutions. Continue reading

Teacher Demo/Student Activity: Bending Water

bending waterIn this demo, a polyethylene rod is charged by rubbing with wool. The charged rod is then used to bend a stream of water flowing from a tap.

Different substances have different attractions for electrons. When two materials are rubbed together, electrons will leave the substance with the lower attractive force and enter the substance with the higher attractive force. This will result in each substance having a slight positive or negative charge. Water is made up of polar molecules, each containing a negatively charged oxygen end and a positively charged hydrogen end. When a charged rod of material is brought near a thin stream of water, the water will be attracted to the charged rod and the stream of water will bend towards the rod.

Click here to download the complete demo…

The Truth About Toilet Swirl – Southern Hemisphere

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Some notes:
We each repeated the experiment 3 times, and got the same results every time. For those of you who might be skeptical, great! A right circular prismatic kiddie pool is only $10 and you can do the experiment for yourself at your latitude. There’s really no reason you shouldn’t do it for yourself.

Watershed Workout

By Megan Joyner

Grade 8: Understanding Earth and Space Systems Water Systems (watersheds)

Lesson Focus (Overall Expectations)

Big Idea: Water is crucial to life on earth and water systems influence climate and weather patterns. More specifically, after being introduced to the idea that water is a finite resource, the big idea of the day is, if the earth is known as the water planet, where does our water come from? Continue reading