Everyday Science (or general Science) Key Facts.

• The temperature at which all of solid becomes a liquid is called its melting point.
• The temperature at which all of a liquid becomes a gas is called its boiling point.
• Only 2% of the world’s water is in the form of ice.
• The heavies solid is the element osmium.
• The lightest gas is hydrogen. About 99.99% of the volume of hydrogen gas is empty space.
• The average adult has a blood volume of about 5 liters.
• Each day human body breathe in 15000 to 20000 liters of air.
• The average human body contains about 250 grams of sodium chloride.
• The most abundant element in the universe is hydrogen.
• The most abundant element in the earth’s crust is oxygen.
• The second most abundant element in the earth’s crust is silicon.
• The deepest place on Earth is Mariana Trench.
• Bond making is Exothermic Reaction, and Bond breaking is Endothermic Reaction.

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— Solar System | Key Facts
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