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Science, Evolution, and Creationism, by the National Academies, focuses on teaching evolution in today's classrooms. Check out the other publications in our online store.
Here are four different ways chemists use to show a molecule of hydrogen peroxide. In the colored molecule models, hydrogen is white and oxygen is red.
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Windows to the Universe original artwork by Randy Russell.

Hydrogen Peroxide - H2O2

Hydrogen peroxide (H2O2) is a kind of chemical. A molecule of hydrogen peroxide has oxygen and hydrogen atoms in it. Hydrogen peroxide is a clear liquid.

Hydrogen peroxide is in some liquids that are used to clean wounds.

There is a small amount of hydrogen peroxide in Earth's air. Hydrogen peroxide helps change sulfur trioxide (SO3) in the atmosphere into sulfuric acid (H2SO4). Sulfuric acid is part of acid rain.

Last modified February 8, 2006 by Randy Russell.

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Most things around us are made of groups of atoms bonded together into packages called molecules. The atoms in a molecule are held together because they share or exchange electrons. Molecules are made...more

Sulfuric Acid - H2SO4

Sulfuric acid is a very common type of acid. Acid rain has sulfuric acid in it. Acid rain harms plants, fish, and other living things. A type of air pollution causes acid rain. When people burn fossil...more

Acid Rain

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Methane - CH4

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Ammonia - NH3

Ammonia is a kind of gas. Ammonia molecules (NH3) have hydrogen and nitrogen atoms in them. The air you breathe has a tiny bit of ammonia in it. When plants and animals die and decay, they give off ammonia....more

Nitrogen

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF