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Oxygen

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"So Harry, thinking that he would soon have had enough of the library to last him a lifetime, buried himself once more among the dusty volumes, looking for any spell that might enable a human to survive without oxygen. However, though he, Ron, and Hermione searched through their lunchtimes, evenings, and whole weekends — though Harry asked Professor McGonagall for a note of permission to use the Restricted Section, and even asked the irritable, vulture-like librarian Madam Pince, for help — they found nothing whatsoever that would enable Harry to spend an hour underwater and live to tell the tale."
—Description[src]

Oxygen (chemical symbol: O) is a chemical element. In nature, at standard temperature and pressure, oxygen atoms bind to form oxygen gas, a very pale blue gas with no smell or taste with the formula O2. Oxygen is necessary for most known life, and makes up 21.1% of the Earth's atmosphere and comprises most of the mass in water.

Humans can not survive without oxygen, and it seems there are no spells capable of enabling humans to do so.[1] The Bubble-Head Charm, however, might be permeable to gases and therefore allow users to exploit the oxygen present in water.[1]

The use of gillyweed allows one to process oxygen through gills.

When they were investigating the magical creature that had attacked a Muggle landlord in a Welsh lake, Mathilda Grimblehawk and her partner found a clipboard with diving calculations on it; Mathilda referred to inscriptions like "O2" and "50m" as "a strange Muggle code".[2]

Appearances

Notes and references

  1. 1.0 1.1 Harry Potter and the Goblet of Fire, Chapter 26 (The Second Task)
  2. Fantastic Beasts: Cases from the Wizarding World - Case 4: Into the Deep, Act 2

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