- Cape student sues, accuses school officials of slamming her to ground multiple times (04/28/16)46
- Bob Evans restaurant in Cape Girardeau among chain's 21 closings (04/26/16)9
- Missouri House votes to allow concealed weapons without permits (04/28/16)8
- Police report filed, but no charges in incident at Cape Central (04/29/16)38
- Two hurt in motorcycle wreck on Interstate 55 (04/25/16)1
- Senator introduces bill for I-57 that would connect Sikeston with Little Rock (04/28/16)4
- Law firm requests information about Cape's traffic cameras (04/25/16)2
- Local lawmakers split over failed medical marijuana bill; voters may have a say (04/26/16)19
- Local company makes eco-friendly kitty litter that cuts cat-box smell (04/25/16)
- Man accused of pointing BB gun at Chaffee resident (04/26/16)2
Hooked on Science: Build a lightbulb
Create a light bulb by using a few ingredients from around the house.
* Electrical tape
* 8 "D" batteries
* 0.7 mm pencil lead
* Mason jar
* 2 wires with alligator clips
* Toilet paper roll
STEP 1: Use the electrical tape to secure all the "D" batteries together in a series.
STEP 2: Use the electrical tape to secure the alligator clips to the sides of the toilet paper roll.
STEP 3: Place a 0.7 mm piece of pencil lead between the alligator clips at the top of the toilet paper roll.
STEP 4: Place the Mason jar over the toilet paper roll, alligator clips and 0.7 mm piece of pencil lead.
STEP 5: Close the circuit by touching the ends of the alligator clips to the ends of the roll of batteries.
The electrons from the battery flow through the alligator clips and pencil lead, which is actually graphite, creating a closed circuit. The graphite, or filament, becomes so hot it glows and fills the Mason jar with smoke.
Jason Lindsey is a science outreach educator with Hooked on Science. Check out his website www.hookedonscience.org for webcasts and experiments.