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  • What did Antoine Lavoisier contribute to chemistry?
  • He made chemistry a proper science by focusing on careful experiments and measurements.

  • How did Lavoisier show that mass is conserved in chemical reactions?
  • He proved that the total weight of materials stays the same during a chemical reaction.

  • What did Lavoisier do to disprove the phlogiston theory?
  • He showed that burning uses oxygen, not a mysterious substance called phlogiston.

  • How did Lavoisier discover oxygen and hydrogen?
  • He found that oxygen is part of air and helps things burn, and hydrogen combines with oxygen to make water.

  • How did Lavoisier help name and organize chemicals?
  • He made a system for naming chemicals, like naming oxygen and hydrogen.

  • What experiments did Lavoisier do to study combustion and breathing?
  • He burned things and showed that breathing uses oxygen, like slow burning.

  • How did Lavoisier’s job as a tax collector affect his science work?
  • His job gave him money to do science, but it made people dislike him during the French Revolution.

  • What tools did Lavoisier use for his experiments?
  • He used balances to weigh things and special containers to trap gases.

  • How did Lavoisier’s wife help with his discoveries?
  • She helped by writing down his work, drawing pictures, and translating books.

  • Why is Lavoisier still important in science today?
  • His ideas about mass and chemical names are still used in science today.