TEKS Grade 8 Science - 8.8.A Modeling the Universe
Quiz by Texas Education Agency
Grade 8
Science (2017)
Texas Essential Knowledge and Skills (TEKS)
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10 questions
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- Q1The Milky Way galaxy is described as a disk of stars orbiting a central point on the disk. Which of these best explains why people on Earth cannot see the entire shape of the Milky Way?The stars in the center of the galaxy are extremely small.Earth is a part of this galaxyThe center of the galaxy consists of a dense cluster of stars.Many more stars exist outside the galaxy.60s8.8a
- Q2The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related. Which of these observations of Barnard’s Star is most likely accurate?Barnard’s Star is brighter than the sun, has a surface temperature above 5,300 K, and is yellow.Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and is red.Barnard’s Star is brighter than the sun, has a surface temperature below 5,300 K, and is yellow.Barnard’s Star is less bright than the sun, has a surface temperature above 3,800 K, and is red.60s8.8a
- Q3Two stars are identified on the Hertzsprung-Russell diagram below. Based on this diagram, how do the characteristics of Star 1 and Star 2 compare?Star 1 is hotter and less bright than Star 2.Star 1 is cooler and brighter than Star 2.Star 1 is cooler and less bright than Star 2.Star 1 is hotter and brighter than Star 2.60s8.8a
- Q4Which of these correctly compares the masses of different objects in the universe?A moon has less mass than a star and more mass than the planet it orbitsA planet has less mass than a galaxy and more mass than the star it orbits.A galaxy has less mass than a moon and more mass than a planet.A star has less mass than a galaxy and more mass than a planet.60s8.8a
- Q5In November 2013 an object orbiting the sun seemed to disappear behind the sun. When a satellite did not detect the object, astronomers thought that the object had been destroyed when it passed close to the sun. However, when another satellite detected a small, bright object with a fan-shaped tail, astronomers proposed that the object was not destroyed. What type of object were astronomers most likely observing?A cometA nebulaA meteorAn asteroid60s8.8a
- Q6Barnard’s Star is about 5.9 light-years from the sun. The star has an approximate temperature of 2,800 K. Based on the diagram, what spectral class does Barnard’s Star belong to?Spectral class OSpectral class BSpectral class MSpectral class A60s8.8a
- Q7A Hertzsprung-Russell diagram is shown below. Based on this diagram, which type of stars would belong to spectral class M and have the highest luminosity?SupergiantsMain-sequence starsWhite dwarfsGiants60s8.8a
- Q8Four students are asked to describe a nebula and a star. Their responses are shown in the table below. Which student described these two celestial bodies correctly?Student 2Student 4Student 1Student 360s8.8a
- Q9The Hertzsprung-Russell diagram shows how the sun is classified among the stars. A star that is several thousand times brighter than the sun with a temperature lower than 4,000 K would be classified as —a main-sequence star in spectral class K or Ma supergiant in spectral class Ka white dwarf in spectral class Ba main-sequence star in spectral class B60s8.8a
- Q10The universe has many different components. Which list places four components of the universe in the most likely order from smallest to largest?Planets, stars, nebulae, galaxiesNebulae, stars, planets, galaxiesGalaxies, stars, planets, nebulaePlanets, stars, galaxies, nebulae60s8.8a
