A Planetary Nebula Is A(n) ____

question 15

Multiple Choice

A planetary nebula is a(n) ____.

• A) expanding envelope of ionized gas expelled by a dying medium-mass star
• B) expanding envelope of neutral gas and dust expelled by a dying medium-mass star
• C) contracting envelope of dusty material from planets destroyed by a dying medium-mass star
• D) contracting envelope of ionized interstellar medium absorbed by a dying medium-mass star
• E) expanding atmosphere of a medium-mass star as it becomes a red giant

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Definitions:

Private Good

A type of good that is rivalrous and excludable, meaning its consumption by one individual prevents others from consuming it.

Common Resource

A type of good that provides users with tangible benefits, but which is available to everyone, such as air, water, and fish in the open sea, leading to potential overuse problems.

Common Resource

A natural or man-made resource where one person’s use diminishes other people’s access or enjoyment, but it is difficult to exclude anyone from using it.

Pollution Market Failure

Pollution market failure occurs when the environmental costs of pollution are not reflected in the market prices of goods or services, leading to overconsumption and excessive pollution.