Question

many comets in the solar system are located within the kuiper belt, a region of space beyond neptunes orbit. but many more comets may be located within the oort cloud, a region of space at the edge of the solar system. if disturbed by gravity, some comets in the kuiper belt or oort cloud can travel toward the sun into the inner solar system.
select the true statements about comets in the solar system.

• most comets are located well beyond the orbit of neptune.
• comets are typically composed of metal, and contain little dust or ice.
• comets have a solid nucleus, a gaseous coma, and a long tail.
• the nucleus of a typical comet is less than 100 kilometers in diameter.

Explanation:

1. Analyze "Most comets are located well beyond the orbit of Neptune": The text says many comets are in the Kuiper belt (beyond Neptune) and many more in the Oort cloud (edge of solar system, also beyond Neptune), so this is true.
2. Analyze "Comets are typically composed of metal, and contain little dust or ice": Comets are known to be composed of ice, dust, and rock (not mainly metal with little dust/ice), so this is false.
3. Analyze "Comets have a solid nucleus, a gaseous coma, and a long tail": This is a correct scientific fact about comet structure.
4. Analyze "The nucleus of a typical comet is less than 100 kilometers in diameter": This is a correct fact about typical comet nuclei.

Answer:

A. Most comets are located well beyond the orbit of Neptune
C. Comets have a solid nucleus, a gaseous coma, and a long tail
D. The nucleus of a typical comet is less than 100 kilometers in diameter

(Note: The option about comets being composed of metal with little dust/ice is incorrect, so it's excluded.)