Carbon dioxide lab practice

In our last lab class we were able to understand Carbon dioxide and how it is excreted from our body.Our teacher asked us to do an experiment using a candle, a thermometer and a tube filled with lime water which is a solution that reacts when it is in contact with carbon dioxide.Finally she asked us to take notes to answer some questions 

teachers blog(questions/experiment):

answer to questions:

1a)The temperature of the thermometer went up from 29° to 30º because of the heat that we transmites after we exhale

1c)After blowing into the tube, the limewater turned whitish because it reacted to carbon dioxide

1d)After blowing in the glowing candle, the glow became reddish and more smoke came out of it because of the oxygen and carbon dioxide we transmitted in our breath

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