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1.Why did the candle stop burning?
2.Why did the water rise?
3.How far did the water rise? Why?
4.What does this experiment show about air?
Discussing
Because it has used up the oxygen in the air.
Because the force outside the jar is stronger than the force inside the jar.
It rises about one fifth of the jar.
It shows that about one fifth of the air is made up of oxygen.
Show time
Homework