The Number of Known Asteroids Rose Sharply in the 1890s

question 95

Multiple Choice

The number of known asteroids rose sharply in the 1890s.What was the cause of this increase?

• A) The technique of astrophotography was introduced.
• B) The first very large telescopes were built.
• C) Better theoretical predictions of where to look for asteroids became available.
• D) A series of collisions involving large objects between the orbits of Mars and Jupiter resulted in many more asteroids being formed.

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Definitions:

Chloropyridines

Organic compounds consisting of a pyridine ring substituted with one or more chlorine atoms.

NaCN

Sodium cyanide, a highly toxic salt used industrially in gold mining and as a reactant in organic synthesis, particularly for nitrile formation.

Tertiary Amine

A nitrogen-containing compound where the nitrogen atom is bonded to three carbon atoms, often used as a base or catalyst in organic synthesis.

Alkaloid

A group of naturally occurring chemical compounds that mostly contain basic nitrogen atoms, found in plants and are often used for their medicinal properties.