Naomi+S

__**Question**__ What type of wood will burn for the longest and with the greatest change in temperature?


 * __Hypothesis__** If a wood has the greatest density, then it will have the longest burn time and highest temperature.

__**Materials**__ 1. wood stove 2. fire starters 3. matches 4. wood 5. stop watch 6. water 7. thermometer 8. bucket 9. scale 10. fire resistant rug 11. fire extinguisher 12. measuring cup 13. metal pan 14. 2 metal grates 15. 4x4 inch piece of chicken wire 16. 4 bricks

__**Procedure**__ 1. check chimney to be open 2. clean out ashes from woodstove 3. set up system to hold wood and water 4. weigh 25g of wood 5. have water bucket and fire resistant rug at fireplace 6. put fire starter in wood stove 7. put 25g of wood on top of the fire starter in wood stove 8. start fire 9. start timing when wood is on fire 10. take temp. by looking at the difference in temp. of water from before and after to see which type of wood pellet has the greatest change 11. stop timing when no flame is left 12. record all data 13. repeat 8 times with each wood type

11/6/10 Today I tested 8 25g pieces of fir wood. Each time I burned a piece of wood I started with the 750mL of water at 66 degrees F. When I started the fire I waited until the wood was on fire to start timing. I tested the water temperature every 2 minutes. The end temperature of the water was the same in 4 out of 8 tests. I stopped timing when the fire was completely out and the times of all the tests were fairly close in duration.
 * __Data and Observations__**