MYP 7 Science - Chemistry

MYP 7.4.4: The oxygen cycle

Percentage oxygen in the air, the oxygen cycle


  • To measure the percentage of oxygen in the air
  • To observe and understand an oxidation reaction.
  • To understand that oxygen is both used and replenished by biological activity. The symbiosis between flora and fauna.
  • To understand that disruption of the natural cycles could be disastrous.


History - Joseph Priestley and his mouse! Note Scheele and Lavoisier.

Teacher demo removal of oxygen from air.


Environmental Science: The Carbon and Oxygen Cycles - p50

Flash: The percentage oxygen in the air

Powerpoint: Joseph Priestly's experiments

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Copyright: 2003 Isis Publication