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  2. Oxygen - Wikipedia

    en.wikipedia.org/wiki/Oxygen

    Oxygen is the third most abundant chemical element in the universe, after hydrogen and helium. [68] About 0.9% of the Sun's mass is oxygen. [19] Oxygen constitutes 49.2% of the Earth's crust by mass [69] as part of oxide compounds such as silicon dioxide and is the most abundant element by mass in the Earth's crust.

  3. Earth's outer core - Wikipedia

    en.wikipedia.org/wiki/Earth's_outer_core

    The light elements sulfur, silicon, oxygen, carbon, and hydrogen may constitute part of the outer core due to their abundance and ability to partition into liquid iron under certain conditions. The depletion of siderophile elements in Earth's mantle compared to chondritic meteorites is attributed to metal-silicate reactions during formation of ...

  4. 50 Random And Interesting Facts You Might Not Know ... - AOL

    www.aol.com/80-random-interesting-facts-might...

    BSc meteorologist Janice Davila tells Bored Panda that one of the most unknown facts from her field of expertise is that weather radars are slightly tilted upward in a half-degree (1/2°) angle.

  5. Solid oxygen - Wikipedia

    en.wikipedia.org/wiki/Solid_oxygen

    Solid oxygen forms at normal atmospheric pressure at a temperature below 54.36 K (−218.79 °C, −361.82 °F). Solid oxygen O 2 , like liquid oxygen , is a clear substance with a light sky-blue color caused by absorption in the red part of the visible light spectrum.

  6. 50 ‘Unbelievable Facts’ To Make You The Most Interesting ...

    www.aol.com/79-most-interesting-fascinating...

    And the Instagram page ‘Unbelievable Facts’ is one of the best places to do just that. Every day, they share fascinating trivia, building a collection that now includes over 10,000 unique facts.

  7. 50 Cool And Interesting Facts About The World That May Be New ...

    www.aol.com/lifestyle/65-cool-interesting-facts...

    We all get bored at some point. One survey found that the average American adult experiences 131 days of boredom per year. And most of it happens at work. Another study revealed that employees are ...

  8. Geological history of oxygen - Wikipedia

    en.wikipedia.org/wiki/Geological_history_of_oxygen

    Stages 4 and 5 (0.85 Ga–present): O 2 sinks filled, the gas accumulates. [1] Although oxygen is the most abundant element in Earth's crust, due to its high reactivity it mostly exists in compound forms such as water, carbon dioxide, iron oxides and silicates.

  9. 30 Random Facts That Are So Interesting You Might Want To ...

    www.aol.com/84-interesting-facts-might-not...

    But then there are those hard facts, like water boiling at 100°C (212°F), that truly enrich our understanding of the world. One great place to discover these intriguing facts about all sorts of ...