ASTRO 101 FINAL EXAM. QUESTIONS WITH 100% CORRECT ANSWERS.

The ocean tides of the earth are? attracted to the moon by its gravitational pull - Highest when the moon is full or new Red stars are _____ than blue stars cooler Red stars are supergiant’s Blue stars are hotter than red stars Modern telescopes use mirrors made of glass because glass can be "zero expansion" and doesn't change shape the size of mountains on earth is limited by? Gravity Earth is not a perfect sphere because? its rotation what did fraunhofer discover that newton missed? -That if white light is passed through a prism, it separates into a rainbow, which is called a spectrum -Segments of colors missing from the complete spectrum Hubble Deep Field is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. What Characteristics Do the Inner Planets Share That the Outer Ones Do Not? Inner planets are denser and mostly composed of rock and metal. -rotate slower -the other planets are mostly made of gas and a lot larger you find a rock that contains uranium and led, you ask a geologist to determine its age and by measure the amounts of lead and uranium, plus its. radioactive decay at the moment, then over a period of time you do the same experiment radiometric dating the process of measuring the absolute age of geologic material by measuring the concentrations of radioactive isotopes and their decay products an element like uranium has a number of isotopes, by which we mean that? some uranium nuclei have different numbers of neutrons but the same number of protons Earthquakes tell us that the earth is geological active, how? because of the heating of internal mantel/materials, and their magnetic waves the earth has a dense core because? heavier elements travel down Traverse waves waves that move the medium's particles at right angles to the direction in which the wave travels Longitude wave a wave in which the particles of the medium move parallel to the direction the wave is traveling Seismology The study of earthquakes Plate tectonics The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle. The clouds on Venus thick and sulfuric acid Earths Mantles Lithosphere - rocky upper section mixed with crust asthenosphere - intermediate zone in mantle mesosphere - lower mantle Detraction the bending of waves around a barrier or through an opening detraction limit the furthest you can see clearly without blurred Kuiper Belt A region of the solar system that is just beyond the orbit of Neptune and that contains small bodies made mostly of ice gravitational slingshot Term that describes how the Pioneer 11 spacecraft used Jupiter to propel itself to Saturn in September 1979 Eddington Confirmed the prediction that even light can't escape gravity. - did an experiment that starlight will be deflected when it passes near a massive object (gravity) to consists einstines law of Gravity Magnetic Remanence The magnetization left behind after information has been removed from a piece of magnetic media how do we measure the tectonic motion of earth? By using artificial sataillights from variety of telescopes the aurora borealis occurs when by the earths magnetic field deflects charged particles to the north, where they bombard the atmosphere KT extinction 65 million years ago; dinosaurs and other animals of the time went extinct