Because They Lacked Stone, the Ancient Sumerians Built Their Cities

question 14

Multiple Choice

Because they lacked stone, the ancient Sumerians built their cities from:

• A) wood.
• B) a mixture of sand and water.
• C) plaster over reeds.
• D) sun-dried brick.
• E) lapis lazuli.

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Definitions:

Reagents

Additives or chemical entities added to a system aimed at causing a chemical reaction or to examine the possibility of a reaction occurring.

Synthesis

The process of combining simpler substances chemically to form a new, more complex substance.

Sulfonium Salts

Ionic compounds that contain a positively charged sulfur atom directly bonded to three organic groups.

SAM

S-Adenosylmethionine, a compound involved in methyl group transfers in biological processes.