Astr 1102- Final Study Guide Rated A+

The way energy is transported in the outer region of the sun is: A) via hot "bubbles" of gas circulating up and down, transferring energy from the inner hotter to the outer cooler areas. B) via radiation diffusing out of the gas, interacting with it and depositing energy. C) via nuclear reactions happening at the outer region of the sun. {Ans: A}The black-body spectrum of a star peaks at a longer wavelength than that of that of the sun. The star therefore must be: A) Hotter than the sun B) Cooler than the sun C) at the same temperature as the sun {Ans: B}If a star is expanding: A) Gravity is overcoming pressure B) Gravity and pressure are in balance C) Pressure is overcoming gravity {Ans: C}Compared to the energy produced in the core of the Sun, the surface emits: A) Less energy B) The same amount of energy C) More energy {Ans: B}The interstellar space is: A) vacuum space B) made of dust and gas C) as dense as the Earth's atmosphere {Ans: B}What's left behind after a supernova explosion? There could be more than 1 correct answer. A) A neutron star B) A