Lithium
Oxygen
Carbon
Helium
Oxygen.
The chemical formula of water is H2O.
Quartzite. Quartzite is the metamorphic equivalent of sandstone.
Smoke. Much of the smoke in smog comes from the industrial burning of coal.
Cashew. Cashews, which are native to Brazil, were carried to India around 1560, then spread to Asia and Africa.
Sonar. "Passive sonar" is listening to the underwater sounds made by vehicles.
Saltwater Crocodile. The Saltwater Crocodile is the largest reptile in the world.
1,350,000 M.P.H.. The Milky Way contains roughly one-hundred billion stars.
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