Oxygen is a chemical element with symbol O and atomic number 8. It's essential for life on earth because it's part of the air we breathe and water we drink.
Imagine oxygen as your favorite celebrity at an awards show after-party - everyone wants to be near them! In chemistry terms, many elements (like hydrogen) want to bond with oxygen because it helps them become more stable.
Oxidation: The process or result of oxidizing or being oxidized; loss of electrons during a reaction by a molecule, atom or ion.
Respiration: The process by which cells break down simple food molecules such as glucose and release the energy they contain.
Ozone Layer: A layer in Earth's atmosphere containing relatively high concentrations of ozone (O3). It absorbs most of the Sun's ultraviolet radiation.
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