FREE AND STUDY GAMES ABOUT GENREAL ASTRONOMY

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FREE AND STUDY GAMES ABOUT GENREAL ASTRONOMY

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -67 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: The celestial sphere turns once around each day because

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the planet on which we live is rotating Question 2: The Stefan-Boltzmann Law relates the energy flux coming from a blackbody (such

as a star) to its:

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temperature Question 3: Newton showed that to change the direction in which an object is moving, one

needs to apply:

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there must be a cause-which is a net external force Question 4: The way scientists know that a hypothesis in astronomy is a reasonable description of nature is to

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do experiments and observations about the predictions of the hypothesis

Question 5: A light year is

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the distance that light travels in one year

Question 6: For scientists, an element (like gold) is defined by

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the number of protons in its nucleus.

Question 7: How fast do electro-magnetic waves travel?

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at the speed of light Question 8: What happens as an electron falls from a higher level to a lower level in an atom?

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a photon is given off

Question 9: The Earth is closest to the Sun in which month of the year?

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January Question 10: The granulation pattern that astronomers have observed on the surface of the Sun

tells us that:

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hot material must be rising from the Sun's hotter interior Question 11: A star is 230 light years away. The light we see tonight from that star left it

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230 years ago Question 12: Why do astronomers prefer to put infrared telescopes on high-flying airplanes or on satellites in space?

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because the water vapor in the lower atmosphere is very good at absorbing infrared

Question 13: (In the absence of a strong magnetic field), what is the chief factor that determines

what type of electromagnetic radiation objects give off:

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their temperature Question 14: Why do telescopes have to have a good motorized drive system to move them quickly and smoothly?

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because the Earth is rotating, with the telescope attached to it Question 15: In an ellipse, the ratio of the distance between the foci and the length of the major

axis is called:

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the semi-major axis Question 16: The 88 sectors into which astronomers today divide the celestial sphere (the whole

sky) are called:

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Constellations Question 17: When a comet like Comet Hale-Bopp comes closest to the Sun in its orbit, we say

that it is at:

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perihelion Question 18: Which of the following has a longer integration time (can collect light for a longer period of time) than the human eye?

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photographic film, photographic plates, a CCD (charge coupled device) Question 19: The most important function of an astronomical telescope is to:

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collect as much light as possible and bring it to a focus

Question 20: When a knowledgeable amateur astronomer tells you that she has a 14-inch telescope, what does the number 14 refer to?

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the diameter of the primary lens or mirror Question 21: Which of the following is NOT a detector of radiation from space that astronomers have used?

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a refracting telescope Question 22: According to the geocentric view, everything in the heavens had to go around the Earth, which was the center of the universe. What objects did Galileo discover with his telescope that clearly didn't go around the Earth?

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moons around the planet Jupiter

Question 23: The material inside the Sun is in the form of a

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plasma Question 24: What was the major problem with the Hubble Space Telescope when it was first launched into orbit?

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The most serious and notorious of these was an optical defect called spherical aberration, which was caused by the malfunction of a measuring device used during the polishing of the mirror.Question 25: Sunspots are darker than the regions of the Sun around them because

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they are cooler than the material around them (although still very hot compared to Earth temperatures)

Question 26: Why is an absorption spectrum especially useful for astronomers?

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It has dark lines in it that allow astronomers to determine what chements are in the star