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AIR
About 78% nitrogen gas (N2) and 21%
oxygen gas (O2), with smaller amounts of other gases including water vapor, carbon dioxide, and argon.
CLOUD
Microscopic droplets of liquid water suspended in AIR.
WET SAND
Pieces of solid silicon dioxide (SiO2), mixed with SALT WATER.
SALT WATER
Salts like sodium chlorine (NaCl, shown) dissolved in water. Sodium atoms are attracted to the oxygen atoms in water molecules, and chlorine atoms are attracted to the hydrogen atoms, pulling the sodium chloride apart.
DRY SAND
Pieces of solid silicon dioxide (SiO2), mixed with salt crystals and AIR.
FOAM ON WAVES
Bubbles of AIR surrounded by SALT WATER.
FRESH WATER
is a general term for water that is not infused with other substances (like salt).
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