Questions and Answers
What is the chemical formula of water?
H2O
What are the three states in which water exists on Earth?
solid, liquid, and gas
What are the main constituents of Earth's hydrosphere and the fluids of all known living organisms?
water
What percentage of the Earth's surface is covered by water?
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What are the two hydrogen atoms in a water molecule connected to?
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Study Notes
Chemical Composition of Water
- The chemical formula of water is H2O.
States of Water
- Water exists on Earth in three states: solid (ice), liquid (water), and gas (water vapor).
Hydrosphere and Living Organisms
- The main constituents of Earth's hydrosphere are water and the fluids of all known living organisms.
Water Coverage on Earth
- Water covers approximately 71% of the Earth's surface.
Water Molecule Structure
- In a water molecule, the two hydrogen atoms are connected to a single oxygen atom.
