1. By: Anthony Richardson
The Light Bulb

2. Who
The inventor Thomas Alva Edison invented the light bulb.

3. What
He invented the light bulb.

4. When
In 1879, Thomas Edison discovered a carbon filament in an oxygen-free bulb glowed but did not burn up for 40 hours. He eventually produced a bulb that could glow for up to 1500 hours.

5. Where
Thomas Edison invented the light bulb in the United States.

6. Why
It was invented to replace candles and oil lamps. It was also invented to produce light for extended periods of time.

7. How
He experimented with thousands of different filaments to find just the right materials to glow well and be long lasting.