How Does Chalk Form

question 33

Multiple Choice

How does chalk form?

• A) evaporation of water in a lake or sea
• B) accumulation of microscopic organisms composed of calcium carbonate
• C) precipitation from seawater early in Earth's history
• D) accumulation of silica-rich organisms or mixing of seawater and groundwater

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Definitions:

Dienes

Organic compounds containing two double bonds, which may vary in their arrangements and contribute to the compound's reactivity, particularly in polymerization and Diels-Alder reactions.

Major Product

The product of a chemical reaction that is formed in the greatest quantity, as determined by the reaction conditions and mechanism.

HBr

Hydrobromic acid, a strong acid formed by dissolving hydrogen bromide in water, used in organic synthesis and as a catalyst.

Addition

A chemical reaction where two or more substances combine to form a single product, often involving the breaking of double or triple bonds.