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Home Page Science Space Science Astronomy Essay Questions for Astronomy Final - Flashcards

Essay Questions for Astronomy Final – Flashcards

Amari Finch
7 July 2022
9 test answers

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question
Explain the colors of emission nebulae.
answer
emission from ionized hydrogen, and emission from other atoms
question
Why does a reflection nebula look blue?
answer
light of nearby stars
question
A typical protostar may be several thousand times more luminous than our Sun; where does this g energy come from?
answer
From the release of gravitational energy
question
What are thought to be some possible causes of triggering the contraction of an interstellar cloud?
answer
supernova, type O and B Stars, parts of the cold cloud
question
Why does gravitational contraction halt in collapsing protostars?
answer
radiation pressure stabilizes the collapsing protostar
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question
Jupiter and the Sun have almost the same composition and density; why isn't Jupiter also a star?
answer
Jupiter does not have enough mass
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question
Contrast the appearance of the H-R diagrams of a young open and old globular cluster.
answer
In a young cluster, the main sequence is well defined, particularly to the top left, red giants now populate the top right portion of the diagram.
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question
How does the interstellar gas change the light of stars passing through it, even if no dust is also present?
answer
thin atoms of gas will absorb some wavelengths of light,
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question
How does the mass of the protostar impact its future evolution?
answer
The higher the mass, the greater its gravit
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Question
What is the right structure for an essay
Answer
A paragraph is a related group of sentences that develops one main idea. Each paragraph in the body of the essay should contain:
  • a topic sentence that states the main or controlling idea
  • supporting sentences to explain and develop the point you’re making
  • evidence from your reading or an example from the subject area that supports your point
  • analysis of the implication/significance/impact of the evidence finished off with a critical conclusion you have drawn from the evidence.