The ____ of a Comet Is a Lump of Fragile

question 3

Multiple Choice

The ____ of a comet is a lump of fragile, porous material containing ices of water, carbon dioxide, and ammonia.

• A) nucleus
• B) coma
• C) dust tail
• D) gas tail
• E) chondrule

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Definitions:

Black and White Vision

A type of vision characterized by the perception of images in shades of black and white, typically referring to the functioning of rod cells in low-light conditions.

Night

The period of darkness between sunset and sunrise when the sun is below the horizon, characterized by reduced visibility and typically considered a time for rest.

Center of the Eye

Refers to the pupil, the circular, black-looking opening in the iris that regulates the amount of light that enters the eye.

Optic Nerve

A cranial nerve that transmits visual information from the retina to the brain.