Transcript Denton ISD
UNIVERSE REVIEW 8.8 A,B,C,D Use the above diagram to label the parts of the wave. 1 Trough 2 Crest 3 Wavelength 4 Amplitude Which of the above waves has the greatest energy? The higher the frequency, the more energy a wave is carrying. Which electromagnetic waves can humans see? A Microwaves B X-rays C Light D Radio The higher the frequency, the more energy a wave is carrying. Which of the following electromagnetic waves has the most energy on the electromagnetic spectrum? A Infrared B X-Rays C Gamma D Radio Sequence the three waves by their wavelengths from shortest to longest. A. B. C. D. Wave Z, Wave Y, Wave X Wave Z, Wave X, Wave Y Wave Y, Wave X, Wave Z All three have equal wavelengths. A light-year is a measurement of — A time B distance C energy D days in a year Which of the following measurements is best used to measure distances in the universe? A Meter (m) B Kilometer (km) C Astronomical unit ( AU) D Light-year (ly) In a red shift, the wavelengths of light appear to become — F shorter G longer H faster J bluer http://www.faradayschools.com/ks4-the-red-shift/ A galaxy that is moving toward Earth will show — A a red shift in its spectrum B an increase in light-years C a blue shift in its spectrum D increased amounts of energy What do all galaxies have in common? A They travel around the Sun. B They are the same shape. C They are made of stars and nebulae. D They are the same distance from Earth. Galaxies are classified by A. Shape B. Size C. Color D. Age Our sun is one of about 250 billion stars in the Milky Way galaxy. The Milky Way is a(n): A. elliptical galaxy B. cluster galaxy C. irregular galaxy D. spiral galaxy http://thenextweb.com/google/2012/11/14/100000-stars-googles-latest-chrome-experiment-tapsnasa-to-visually-explore-the-milky-way/ Proxima Centauri is 4.3 light years away from Earth. A light year is about 6 trillion miles. About how far away (in miles) is Proxima Centauri from Earth? A. 2.6 billion miles B. 25.8 billion miles C. 2.6 trillion miles D. 26 trillion miles 4.3 light years x 6 25.8 trillion miles The picture above shows sand used to make a model of a galaxy. In the model, each small grain of sand best represents: A. a comet B. a black hole C. an asteroid D. a star Astronomers use a light year as the unit for reporting which of the following items: Light year = the distance light travels in a year A. The diameter of stars B. The age of stars C. The distance between stars D. The brightness of stars How are the wave energy and the wavelength in the electromagnetic spectrum related? A. As wavelength gets shorter, the waves have more energy. B. As wavelength gets longer, the waves have more energy. C. As wavelength gets shorter, the waves have less energy. D. As wavelength gets shorter, the waves have the same energy. 104 102 1 10-2 10-5 10-6 10-8 Wavelength in centimeters According to the diagram, which of the following types of wave energy has the HIGHEST frequency? A. B. C. D. gamma ray ultraviolet infrared microwave 10-10 10-12 What part of the electromagnetic spectrum do astronomers use to determine the temperature of a star? a) X-rays b) Gamma rays c) Visible light d) UV light Astronomers use an instrument called a spectroscope to see the colors a star emits. It disperses, or separates, white light from a star into a very wide spectrum of colors. This helps us to determine a star’s temperature. http://amazing-space.stsci.edu/resources/explorations/groundup/lesson/basics/g23/ Complete the life cycle of a high-mass star: main sequence super-giant _____?______ neutron star a) white dwarf b) red giant c) supernova d) nebula http://www.schoolsobservatory.org.uk/astro/stars/lifecycle White dwarfs are a group of stars that are — a. extremely bright and average in temperature b. low in brightness but high in temperature c. average brightness and average in temperature d. average in brightness but high in temperature White dwarfs are very small stars, so do not emit very much light The Sun is a yellow star that is average in both brightness and in temperature. The Sun belongs to which group? a.Giants b.Main sequence c. Supergiants d.White dwarfs The Sun and Alpha Centauri shine with about the same brightness, yet the Sun appears to us to be several hundred times brighter than Alpha Centauri. What is the best explanation for this? a) Alpha Centauri is a larger star than the Sun. b) The Sun generates energy through the process of fusion. c) The Sun is thousands of times closer to Earth than Alpha Centauri. d) Some light from Alpha Centauri is blocked by the Moon. Brenda has identified a new star. She wants to determine the elements in the star by studying the pattern of dark lines in the absorption spectrum. What instrument should she use to identify the elements in the star? A electron microscope B telescope C spectroscope D gas chromatograph http://academics.wellesley.edu/Chemistry/Chem105manual/Chem105manualSummer07/Lab03/lab03.html In what ways are Barnard’s Star and Antares alike? a.both are dim b.both are bright c. both are about the same temperature d.both are main sequence stars According to the HR diagram, the star Antares is classified as a: a. main sequence star b. white dwarf star c. protostar d. supergiant star What color is Altair? a.Blue b.Red c. Yellow d.White The Sun is a yellow star that is average in both brightness and in temperature. The Sun belongs to which group? a) b) c) d) Giants Main sequence Supergiants White dwarfs The Milky Way galaxy is a discshaped, spiral galaxy estimated to be 130,000 light years in diameter. According to the diagram above, how would you describe the location of the Sun within the Milky Way galaxy? A The Sun is near the center of the galaxy. B The Sun is located just outside of the galaxy. C The Sun is near the edge of the galaxy. D The Sun is at the center of the galaxy. The 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? a) Earth is a part of this galaxy. b) Many more stars exist outside the galaxy. c) The stars in the center of the galaxy are extremely small. d) The center of the galaxy consists of a dense cluster of stars.