SCI112BX Unit 4 Review – Flashcards
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Which layer of the sun is only seen during a total solar eclipse? A. core B. photosphere C. corona D. convective zone
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C
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Which layer of the sun has the highest temperature? A. core B. photosphere C. chromosphere D. corona
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A
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Why do the planets in our solar system stay in their positions? A. The sun's radiation keeps them there B. They travel the same distance from each other. C. The sun's gravity keeps them in place. D. Friction with the atmosphere keeps them from escaping.
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C
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During which phase of the moon do we see the entire lighted side of the moon? A. new moon B. first quarter C. full moon D. waning gibbous
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C
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Which term do we use when we are seeing more and more of the lighted portion of the moon each night? A. full B. waning C. waxing D. new
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C
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How long does it take the moon to rotate on its axis? A. about 25.3 days B. about 27.3 days C. about 30 days D. about 2 months
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B
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When do spring tides occur? A. during a new moon B. during a first quarter moon C. during a waxing gibbous moon D. during a waning crescent moon
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A
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What is it called when the moon is closest to earth in its orbit? A. spring B. neap C. apogee D. perigee
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D
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Which of the following is not caused by the moon? A. tides B. eclipses C. moonrise D. sunrise
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D
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Which of the following experiences the least amount of seasonal variation? A. Iceland B. the equator C. the Northern Hemisphere D. the Southern Hemisphere
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B
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When is the Northern Hemisphere tilted away from the sun? A. June B. September C. December D. March
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C
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What is the cause for the seasons? A. the rotation of the earth B. earth's tilted axis C. earth's distance from the sun D. heating of the equatorial regions
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B
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Most of the mass of the solar system is located in which of the following? A. Jupiter B. the earth C. comets D. the sun
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D
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Which explanation accounts for where rocky planets formed? A. Heavy elements form in the outer regions of the disk due to the spinning protostar. B. The inner portions of the disk are warm from the protostar, making the heavy elements remain there. C. Heavy elements spin into the outer regions of the disk due to their mass. D. The inner portions of the disk are cold from the protostar, making the heavy elements remain there.
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B
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Which aspect of the nebular hypothesis accounts for the planets orbiting in the same direction and plane? A. The large cloud of gas and dust collapsed. B. The collapsing gas and dust cloud began to spin and form a disk. C. Most material coalesced into the center of the disk. D. The outer portions of the disk were cool.
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B
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Small rocky bodies that are thought to be leftover remnants from the formation of the solar system are called A. asteroids B. planets C. comets D. Oort Clouds
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A
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Which part of a comet always points away from the sun? A. nucleus B. tail C. coma D. jet
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B
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Inner planets that are composed mainly of rock and metal are called A. terrestrial planets B. gas planets C. dwarf planets D. red stars
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A
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Which of the following planets rotates on its side? A. Mars B. Jupiter C. Neptune D. Uranus
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D
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Which of the following planets has an iron and nickel core? A. Jupiter B. Mars C. Neptune D. Saturn
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B
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Which of the following parameters can tell you about a planet's composition? A. orbit B. gravity C. size D. density
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D
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Which of the following forms of electromagnetic radiation has the longest wavelength? A. red light B. radio waves C. infrared light D. microwaves
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B
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Which of the following is used commonly in medical imagery? A. X-rays B. blue light C. ultraviolet light D. radio waves
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A
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If you wanted to determine the temperature of a star, which measurement would you make? A. absorption spectrum B. Doppler shift C. emission spectrum D. refraction
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C
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Which of the following is true about radio waves? A. They have short wavelengths. B. They have high energies. C. They reveal hot gases. D. They can penetrate dust clouds.
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D
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Which of the following best reduces atmospheric distortion? A. primary mirror B. adaptive optics C. objective lens D. eyepiece
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B
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Which of the following is the correct path of light through a reflecting telescope? A. eyepiece -> primary mirror -> secondary mirror -> eye B. secondary mirror -> primary mirror -> eye -> eyepiece C. primary mirror -> eyepiece -> secondary mirror -> eye D. primary mirror -> secondary mirror -> eyepiece -> eye
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D
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How far is the earth from the sun? A. 1 light-year B. 1 parsec C. 1 AU D. 1 kiloparsec
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C
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What is a light-year? A. the distance light travels in 1 year B. a measurement of time within the universe C. a measurement of time within the solar system D. the distance light travels in 1 second
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A
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Which of the following statements about parallax is true? A. The more a star appears to move, the farther it is from earth. B. The less a star appears to move, the farther it is from earth. C. Stars that do not appear to move are very close to earth. D. Stars that appear to move very much are very far from earth.
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B
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Which of the following has the longest life? A. sun B. dwarf star C. giant star D. supernova
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B
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Which type of fusion occurs in the red giant phase? A. hydrogen to helium B. helium to hydrogen C. hydrogen to carbon D. helium to carbon
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D
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Which type of telescope would you need to most easily see a potential neutron star? A. visible light B. X-ray C. infrared D. ultraviolet
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B
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Which type of galaxy is the Milky Way? A. elliptical B. spiral C. irregular D. satellite
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B
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In which part of the Milky Way galaxy is our sun located? A. halo B. bulge C. center D. spiral
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D
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From which of the following do spiral galaxies form? A. rapidly cooling protogalactic clouds B. high-density protogalactic clouds C. rapidly spinning protogalactic clouds D. colliding/merging protogalactic clouds
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C
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If the amount of dark matter and energy is above the critical level, what will happen to the fate of the universe? A. The universe will expand at an accelerated rate. B. The expansion of the universe will stop, and its volume will remain the same. C. The expansion of the universe will slow but continue. D. The universe will stop expanding and collapse in a big crunch.
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D
