Measuring The Stars

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Questions Bank

Our Place in the Universe
Patterns in the Skymotions of Earth
Laws of Motion
Light and Telescopes
The Formation of Stars and Planets
Terrestrial Worlds in the Inner Solar System
Atmospheres of Venus, Earth, and Mars
The Giant Planets
Small Bodies of the Solar System
Measuring the Stars
Our Star: The Sun
Evolution of Low-Mass Stars
Evolution of High-Mass Stars
The Expansion of Space
The Realm of the Galaxies
Our Galaxy: The Milky Way
Modern Cosmology and the Origin of Structure
Life in the Universe

All Questions

Question 1

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True/False

It is not possible to detect a measurable parallax for even the closest stars without the use of a telescope.

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Question 2

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True/False

A parsec is a unit of time.

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Question 3

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True/False

The absolute magnitude of a star is a measure of its luminosity.

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Question 4

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True/False

Stars with a higher apparent brightness are necessarily closer to us than fainter stars.

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Question 5

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True/False

Excluding the Sun,not a single star has an observed parallax greater than 1 arcsecond.

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Question 6

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A star with the same luminosity as the Sun,but which is twice as hot,must be four times as big.

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Question 7

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The emission spectrum of a helium atom is identical to that of a carbon atom.

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Question 8

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Heisenberg's uncertainty principle tells us that an electron in an atom behaves more like a cloud than a pointlike particle.

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Question 9

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An emission line is produced when an atom absorbs a photon of a specific energy.

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Question 10

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A thin cloud of cool gas on top of a hotter blackbody will radiate an emission spectrum.

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Question 11

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The emission and absorption lines of a given atom occur at the exact same energies.

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Question 12

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B stars are cooler than M stars.

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Question 13

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Stars of spectral class A have the most hydrogen whereas stars of spectral class O have the least hydrogen.

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Question 14

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Spectra of the coolest stars show the largest amount of absorption from molecules like TiO and CN.

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Question 15

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Binary star systems are extremely useful in studying stars because they allow us to determine stars' masses.

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Question 16

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When looking at a standard H-R diagram,the hottest stars are on the left-hand side of the diagram.

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Question 17

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Mass determines the position of a star on the main sequence.

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Question 18

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The stars that have the largest radii are classified as supergiants.

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Question 19

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Mass solely determines the position of a star on the H-R diagram.

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Question 20

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Among main-sequence stars,the most massive stars are more luminous,redder,cooler,and have larger radii than less massive stars.

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