How Much Candy Would Kill You?

Before you stuff your face with candy until you max out this Halloween, we want you to ask yourself how much is too much. Well folks, in keeping with the dark, spooky atmosphere of late October, we’re taking a look at how many pieces of fun sized candy can kill you – if all eaten in one sitting. Oh and for you candy corn lovers out there, we’re crunches those numbers too. 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…