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Hooked on Science - Build a Light Bulb

hooked science 300KENTUCKY (8/13/13) - Have you ever wanted to create your own light bulb? You can and all you need are a few ingredients from around the house.
 
INGREDIENTS
• Electrical Tape
• 8 “D” Batteries
• 0.7 mm Pencil Lead
• Mason Jar
• 2 Wires with Alligator Clips
• Toilet Paper Roll
 
INSTRUCTIONS
STEP 1: Use the electrical tape to secure all of 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.
 
EXPLANATION
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. Go to www.hookedonscience.org for more experiments that might get you and your family “Hooked on Science.”

Go to www.hookedonscience.org for more experiments that might get you and your family “Hooked on Science.”

Jason Lindsey
Hooked on Science

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