Astronomy: Chapter 9 Test
Astronomy: Chapter 9 Test Phys 1050
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This 3 page Study Guide was uploaded by Chris Pulcher-Coard on Tuesday March 29, 2016. The Study Guide belongs to Phys 1050 at North Carolina Central University taught by Tanina Bradley in Spring 2016. Since its upload, it has received 27 views.
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Date Created: 03/29/16
1. The solar corona is much cooler than the Sun's surface, hence we must wait for a total solar eclipse to glimpse it with the naked eye. True False 2. The outward pressure of hot gas in the Sun is balanced by the inward gravitational pressure. is increasing the Sun's diameter. weakens the magnetic field. is cooling the photosphere. is responsible for variations in the sunspot cycle. 3. Sunspots are dark splotches on the Sun. Which statement is true? They are solid bodies floating on the surface of the Sun. They are hotter than the surrounding areas of the Sun. They are extremely cold objects, as cold as Pluto. They are extremely hot, but cooler than the surrounding areas of the Sun. They are associated with areas of very low magnetic fields. 4. The solar winds blow outward from the entire photosphere. coronal holes. sunspots. flares. the Sun's poles only. 5. What natural barrier usually prevents two protons from combining? the strong nuclear force the weak nuclear force dark energy gravity electromagnetic repulsion 6. In the protonproton cycle, the positron is a spin conservation particle. intermediate between the proton and neutron in mass. the chief means energy reaches the photosphere. an antielectron. massless. 7. The protonproton cycle converts all of the mass of the four hydrogen atoms into pure energy. True False 8. From inside out, which is in the correct order for the structure of the Sun? core, convective zone, radiative zone, granulation core, radiative zone, convective zone, chromosphere core, convective zone, radiative zone core, photosphere, radiative zone, corona core, chromosphere, photosphere 9. The Sun's structure is uniform throughout its interior, with no evidence of different layers. True False 10. Sunspots are always found close to the Sun's poles. were most numerous during the Maunder Minimum. come in pairs, representing the north and south magnetic fields. travel over the surface of the Sun from pole to pole. are relatively constant in number every year. 11. The bright photosphere is much hotter than the faint corona. True False 12. What is the meaning of the solar constant? the fact that features on the Sun appear to never change the regularity of the 11 year sunspot cycle the stability of the Sun's luminosity for as long as life has existed on Earth the amount of energy the Earth receives per unit area and unit time the fact that the amount of hydrogen turning into helium in the core is fixed 13. A loop of gas following the magnetic field lines between sunspots' poles is a ray. a prominence. a flare. a coronal mass ejection. a coronal hole.
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