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In this experiment i was testing if two candles lasted longer or shorter than one candle while in a jar. I lit a candle then placed a jar over it. and saw how long bit lasted versus two candles. the one candle was the control and two candles was my variable. I learned that fire needs 02 to survive.

my hypothesis for this experiment was that two candles would take a shorter time to burn out than one candle. yes it was correct because the two candles took a shorter time to burn out. the average time in seconds for my control was 57.90 seconds. but the average for my variable was 40.67 seconds. NO.  this experiment was important because it shows that fire needs 02.

a source of error could be if the clay has a hole in it so 02 gets in it. a source of error was when we went to go blow out the match the breath from the blow would also take out a candle. the effect of this would make us struggle to get the candle ready to put the jar over. an improvement would be if we only lightly blew out the match. so they can fix these sources of error.

to see that fire and other things in this world need 02 in order to survive and C02 to survive. It was important to the real world because it shows that like fire we need 02 to survive. you could put a mouse or small animal in a jar and see how long it would last. because like the fire a plant could help the animal survive and you could also put other variable to test. because it makes you not want to stay in an enclosed room for long because you could pass out.

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Untitled infographic by Cy Isabell - Infogram

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Control: blue over takes orange, smaller before it went out, jar got condensated
Variable: even more condensated,one candle went out before the other,they went out faster than just one candle.

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You can scroll from left to right and from up to down.

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You can scroll from left to right and from up to down.

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One of the best in the country for Education, Training for ISEET, CET, NEET, NTSE, etc. Bags several ranks every year and their students get admission to prestigious engineering institutes such as IIT's, NIT's, etc. in large numbers. Run by professionals with a vision. Visit: www.ace-online.co.in

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Experiment to show that air contains oxygen by R.Shanjay Narayana e-Techno School, Arumbakkam, Chennai -106.

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1.flatten a piece of clay large enough to fit in a jar.
2.place a tea light candle in the middle of the clay.
3. put goggles on for safety.
4. use match to light candle when lighting keep sleeves hair and objects away from flame.
5. shake or blow out the mach then put in petri dish be careful not to drop match.
6. at the same time put the jar upside down over lit candle start stopwatch.  when placing jar over the candle press jar into clay to make a seal this is the control.
7. make observations about the flame. record in observation sheet.  use details.
8. Time until flame  burns out.record in seconds in data table.
9. remove jar from candle.
10.carefully wash and rinse the jar use glass safety
11.repeat steps 4-10 two more times for accuracy
12. Find average by adding all times then divide by three
13. flatten a piece of clay large enough to  fit in a jar.
14.place two tea light candles in the middle of the clay.
15.use match to light candles make sure flammable things are not close by.
16.shake or blow match out and put in petri dish do not drop.
17.at the same time put jar upside down over lit candles start stop watch make sure you make a seal between jar and the clay.
18.make observations and record in observation sheet
19.time until flame burns out record in second on the data table
20.remove jar from candle.
21.carefully wash and rinse jar use glass safety.
22.repeat steps 4-10 three more times for accuracy
23.find average by adding all the times you get then divide the number you got by three.

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I think that if you put two candles in rather than one the candles will last shorter because the amount of C02 in the jar is doubled.

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I learned this cycle not too long ago but now i know how the whole thing works. In my own words this is what the C02 02 cycle is. First us humans breathe out C02 and the plants need C02 to live once the plants take the C02 they give off 02 which is what we need. And the cycle keeps going forever..

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fire needs 02 (oxygen) to survive. Just like us humans/land animals.

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What I Know about fire c02 and 02 relations.

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What I Know about fire c02 and 02 relations.

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fire like us takes 02 to survive and blows out c02  and plants need c02 so fire needs plants in order to survive to.

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as you might know there is a relation between co2 and o2. If you do not this is what they have in common. in order for us to live we need plants as you know but plants need us humans and animals to live. How you might ask, this is how when we breathe in we take 02 wich is what plants give of but what we breathe of is c02 and plants need c02 believe it or not. So if you didn't know about this you just learned something but if you already know than congrats for being filled with this knowledge.

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I know that Joe conducted a number of experiments including candles and jars. One experiment he did was the rat experiment . What he did during this is he took a rat and put it in a jar Overtime,it died. He repeated this a lot times. Till he put a plant in with the rat and it actually survived! this shows that rats and all animals survive through plants he also discovered the co2 o2 cycle

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petri dish
teal light candle
clay
jar
lighter
stop watch
goggles
water
paper towels

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THE CONTROL AND VARIABLE:  The control is one candle .and the variable is two candles.

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THE CONTROL AND VARIABLE:  The control is one candle .and the variable is two candles.

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I AM TESTING           how long the candles will burn if there is two candles at a time.

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I AM TESTING           how long the candles will burn if there is two candles at a time.