Examlex
The Persians migrated sometime before the 800s BCE from the Aral Sea region to the southwestern Iranian province of __________, from which the name "Persia" is derived.
Natural Rubber
A polymer of isoprene (2-methyl-1,3-butadiene) harvested mainly from the latex of the rubber tree; it's elastic, water-resistant, and used in various products like tires and gloves.
Petroleum Products
Refined products obtained from the processing of crude oil, such as gasoline, diesel, and kerosene.
Valence Electrons
Electrons in the outermost shell of an atom that are involved in forming chemical bonds.
Oxygen
A chemical element with the symbol O and atomic number 8, known for its essential role in the respiratory processes of most living organisms and in combustion.
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