Fossils May Be

question 34

Multiple Choice

Fossils may be

• A) from impressions left after an organism decays.
• B) formed as organic matter is replaced by minerals, turning to stone.
• C) formed when plant resin or tar preserves the specimen.
• D) casts from footprints that have filled with mud and then turned to stone.
• E) All answers are correct.

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Definitions:

Phosgene

A toxic chemical compound used as an industrial reagent and chemical weapon, with the formula COCl2.

Organic Compound

A compound primarily made of carbon atoms bonded to hydrogen, possibly along with oxygen, nitrogen, sulfur, phosphorus, and halogens.

Carbonated Beverages

Drinks that contain dissolved carbon dioxide gas, creating a fizzy or bubbly texture.

pH

A scale used to specify how acidic or basic (alkaline) an aqueous solution is, based on the concentration of hydrogen ions.