When the candle was lighted, it melted into liquid and became solid again after a few seconds or in a minute. WHAT CAUSES THESE CHANGES?
-presence of heat
-presence of oxygen
-absence of heat
-absence of oxygen
a. presence of heat, absence of heat and presence of oxygen
b. presence of heat and absence of oxygen
c. presence of heat and presence of oxygen
d. All of the above
(you don't know the answer and still commented : report no matter what :DD )
-presence of heat
-presence of oxygen
-absence of heat
-absence of oxygen
a. presence of heat, absence of heat and presence of oxygen
b. presence of heat and absence of oxygen
c. presence of heat and presence of oxygen
d. All of the above
(you don't know the answer and still commented : report no matter what :DD )
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Answer:
D. All of the above
Explanation:
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