Water
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Water is an inorganic compound with the chemical formula H2O. It is a transparent, tasteless, odorless, and nearly colorless chemical substance. It is the main constituent of Earth's streams, lakes, a
A drop of water falling toward water in a glass
This pillow basalt on the seafloor near Hawaii was formed when magma extruded underwater. Other, much older pillow basalt formations provide evidence for large bodies of water long ago in Earth's history.
Specific heat capacity of water
High tide
Carbon dioxide
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Carbon dioxide is a chemical compound with the chemical formula CO2. It is made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in a gas state
Pellets of "dry ice", a common form of solid carbon dioxide
Rising levels of CO2 threatened the Apollo 13 astronauts, who had to adapt cartridges from the command module to supply the carbon dioxide scrubber in the Apollo Lunar Module, which they used as a lifeboat.
A carbon dioxide sensor that measures CO2 concentration using a nondispersive infrared sensor
Pterapod shell dissolved in seawater adjusted to an ocean chemistry projected for the year 2100