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In my experiment, I was testing how long a flame will burn under a jar.I took a candle and matches and lit the candle under a jar. My control was 1 candle and my variable was 2 candles. What I learned from this experiment is 1 candle burns longer than 2 candles because there is more O2 in the jar.
My hypothesis was that 2 candles would burn longer than just one. My hypothesis was incorrect because 1 candle burned the longest between the two.The average for my control was 78.62. The average for my variable was 61.94. In my observations, I noticed that my control trials were in the high 70's low 80's every time. My variable trials were in the low 60;s and high 60's most of the time. These results were important because it taught me that 1 flame will burn longer than 2 because there is more O2 in the jar.
A possible source of error may be that we didn't mold the clay tight enough to the lid of the jar. One source of error in our experiment is the timer didn't start the time as soon as we put the jar in the molded clay.The effect of this error may be the time of the flame(s). Some improvements may be that we have a bigger candle or more clay to put the jar in. Understanding errors is an important skill because the next trial you could try something different.
This experiment was important because it taught us about the relationship between the CO2 / O2 cycle. The CO2/ O2 cycle is plants give off O2 that animals breathe in and exhale CO2 that plants need. Plants and animals depend on each other to survive. This is important to everyone because it will teach them to not kill plants and animals because we need them. A different experiment to test the CO2 O2 cycle would be we could of put a plant in the jar because the plant gives off O2 and fire needs O2. I would choose this experiment because it would be cool to see how long the flame will burn and how the plant will effect the flame time. The CO2/ O2 is awesome because plants and animals depend on each other to survive. It is significant that plants and animals need each other to live.

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1. The candles wouldn't light at first but finally did. The flames were a really light orange
2. The flames were almost out as soon as we lit them but stayed lit for a while. The flame was light blue.
3.The flames were not very large at all, it was a dark orange.

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1. The flame was almost out as soon as we lit it.
2. The flame was huge at first but died down quickly. The flame was a light orange
3. The flame was huge for a while but then died down. The flame was a dark orange.

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Untitled infographic by Nathan Greenberg - Infogram

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CO2 O2 Cycle Video:

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Carbon and oxygen are two elements that are essential to life. They are naturally present in the atmosphere in the form of carbon dioxide and gaseous oxygen. Due to their constant circulation between the soil, air, and water--through processes such as photosynthesis and combustion--living matter is constantly renewed.

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CO2 O2 Cycle

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1. Flatten a piece of clay, large enough for a jar , on the table.
2. Place 2 tea light candles in the center of the clay
3. Put goggles on for safety
4. Use a match to light the candle. CAUTION: when lighting matches keep sleeves, hair, fingers, and objects away from flame flames.
5. Blow out the match and put it in the petri dish . Be careful not to drop the match.
6. At the same time turn the jar upside down over the lit candles and start the stopwatch. When placing the jar over the candles press the jar into the clay to make a seal. This is the variable.
7. Make observations about the flames. Record in observation section. Remember to use details.
8. Time until flames go out. Record time  in seconds in the data table.
9. Remove the jar from the candles
10. Carefully rinse and dry the jar. Caution: Use glassware safety.
11. Repeat steps 4 - 10 two more times for a total of three times for accuracy
12. Find the average of the three numbers : Add all three numbers and divide by three. Record numbers on data table.

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If 1 candle or 2 candles are lit under a glass jar, then 2 candles will create a longer flame time because their is more fire and the flames will take longer to go out than just one flame.

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1. Flatten a piece of clay, large enough for a jar, on the table.
2.  Place a tea light candle in the center of the clay.
3. Put goggles on for safety.
4.  Use a match to light the candle. CAUTION: when lighting matches keep sleeves, hair, fingers, and objects away from flame.
5. Blow out the match and put the match into the petri dish. Be careful not to drop the match.
6. At the same time turn the jar upside down over the lit candle and start the stopwatch. When placing the jar over the candle, press the jar into the clay to make a seal. This is the control.
7. Make observations about the flame. Record in observation section. Remember to use details
8. Time until flame goes out. Record time in seconds in the data table.
9. Remove the jar from the candle
10. Carefully rinse and dry the jar. Caution: use glassware safety.
11. Repeat steps 4-10 two more times for a total of three times for accuracy
12. Find the average of the three trials: add all three numbers and divide by three. Record the numbers in the data table

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1.Tea light candle[s]
2. Clay
3. Petri dish
4. Matches
5. Stopwatch
6. Goggles
7. Quart Jar
8. Water
9. Paper towels

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Everyday you breath in O2 and exhale CO2. Plants give off oxygen but need carbon dioxide. Animals are the  same but they give off CO2 but need O2. Plants and animals depend on each other to keep each other alive. Which is called the CO2 - O2 cycle. My personal experience with CO2 - O2 cycle is breathing oxygen and exhaling CO2. Fire needs oxygen to burn because when you place a jar over a flame it will go out because their is no oxygen or O2.When you place a lot of leaves over a fire it produces smoke because it is being smothered by the leaves.
Fire gives off CO2. The color of the flame is determined by the temperature. The size of the flame is based off by the amount of oxygen and the fuel source. To put out a fire you take away the O2 by smothering it with water, chemicals or solid objects.
Fire has some of the same properties and requirements as animals because they both need O2 and need CO2. Joseph Priestly proved the CO2 - O2 cycle by experimenting with mice. He found a mouse will die in a closed container without oxygen even when given food and water. He put a living plant in the container and the mouse survived, because the plant gave off O2.

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Control: 1 candle Variable: 2 candles

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To see if 1 or 2 candles stay lit the longest under a Mason Jar.