1. The Amount of Heat Light Bulbs Produce. Energy Efficient VS. normal Light Bulbs.

2. Purpose The purpose of this project is to find out if different light bulbs give off different amounts of heat [energy efficient or normal light bulbs]. The purpose of this project is to find out if different light bulbs give off different amounts of heat [energy efficient or normal light bulbs].

3. Question What light bulb will give off the most heat energy efficient or normal light bulbs? What light bulb will give off the most heat energy efficient or normal light bulbs?

4. Hypothesis I think that the normal light bulbs will give off the more heat because the energy efficient use less energy. I think that the normal light bulbs will give off the more heat because the energy efficient use less energy.

5. Materials - Cooler - Thermometer - Light bulbs normal 60.w,40.w - Lamp - Energy efficient 60.w,40.w

6. Method Step 1-record your original temp. Step 1-record your original temp. Step 2-place the light bulb in a lamp. Step 2-place the light bulb in a lamp. Step 3- put the lamp in a cooler. Step 3- put the lamp in a cooler. Step 4- put a thermometer in the cooler. Step 4- put a thermometer in the cooler. Step 5- wait for 1 hour. Step 5- wait for 1 hour. Step 6- check the temperature on the thermometer. Step 6- check the temperature on the thermometer. Step 7- record your data. Step 7- record your data. Step 8- repeat with the other light bulbs. Step 8- repeat with the other light bulbs.

7. Variables Manipulating variable-the type of light bulb. Manipulating variable-the type of light bulb. Controlled variable-the time that the light bulb is shining on the thermometer, the distance between the lamp and the thermometer. Controlled variable-the time that the light bulb is shining on the thermometer, the distance between the lamp and the thermometer. Responding variable-is the temperature change Responding variable-is the temperature change

8. Results Type of light bulb Beginning temp. Temp. after 1h Temp. change e.e. 40 watt 20 ‘c 32 ‘c 12 ‘c e.e. 40 watt 20 ‘c 35 ‘c 15 ‘c e.e. 60 watt 20 ‘c 34 ‘c 14 ‘c e.e. 60 watt 20 ‘c 36 ‘c 16 ‘c Reg40 watt 20 ‘c >50 ‘c 30 ‘c+ Reg40 watt 20 ‘c >50 ‘c 30 ‘c+ Reg60 watt 20 ‘c >50 ‘c 30 ‘c+ Reg60 watt 21 ‘c >50 ‘c 30 ‘c+

9. Temperature Change Temp Change

10. Conclusion The light bulb that produced the most heat was the regular 60w light bulb, then the regular 40w light bulb. The next hottest light bulb was the energy efficient 60w then last and least the energy efficient 40w The light bulb that produced the most heat was the regular 60w light bulb, then the regular 40w light bulb. The next hottest light bulb was the energy efficient 60w then last and least the energy efficient 40w Regular light bulbs give off more heat then energy efficient light bulbs that produce the same amount of light. Regular light bulbs give off more heat then energy efficient light bulbs that produce the same amount of light.

11. Sources of Error My thermometer would only measure up to 50 ‘c. My thermometer would only measure up to 50 ‘c. Some of my light bulbs have been used before the experiment. Some of my light bulbs have been used before the experiment. There was a gap in the cooler where the cord to come out this would allow the heat to escape. There was a gap in the cooler where the cord to come out this would allow the heat to escape.

12. Ways to improve I compared regular light bulbs to energy efficient light bulbs that give off the same amount of light. I would like to compare regular light bulbs with energy efficient that use the same amount of watts.