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Stars
| Question | Answer |
|---|---|
| _______ shift means that the star is moving away from an object. | Red |
| Due to the Doppler effect, electromagnetic waves reaching Earth from a galaxy moving toward Earth would | experience an increase in their frequency. |
| What two elements are most common in stars | Hydrogen and Helium. |
| What is the innermost layer of the sun called? | corona |
| What is the middle layer of the sun called? | chromosphere |
| What is the visible layer of the sun called? | photosphere |
| Sunspots occur on the | photosphere |
| All stars have very similar ______________ compositions | chemical |
| The color of a star indicates its | temperature |
| In what stage does a star spend most of its life? | the main sequence |
| The sun will most likely become a _______ __________ at the end of its lifetime. | white dwarf |
| A red star will have a warmer or cooler temperature than the sun? | cooler |
| After a star runs out of most of its hydrogen fuel, it becomes hotter and more luminous. What stage does this represent in the life cycle of a star? | red giant |
| Most stars in the Milky Way are like the Sun. The Sun will eventually become a red giant. After the red giant stage, what determines whether a star will become a white dwarf or a supernova? | the mass of a star |
| The entire outer portion of a star is blown off in a massive explosion called a | supernova |
| Which star is hotter? a blue star or a red star? | A blue star |
| How bright a start APPEARS. | apparent magnitude |
| How bright a star appears to be based on an equal distance of 10pc. | absolute magnitude |
| Where do stars originate (begin)? | gas clouds |
| What force is responsible for the formation of stars? | gravitational |
| A combination of processes occurs when stars are forming. Which is one process most likely associated with the formation of new stars? | Material accumulates from stars that have died. |
| The formation a star begins with a could of iterstellar gas and dust called a | nebula |
| What is the oldest form of a massive star? | neutron star |
| In 1987, a supernova was detected in the Large Magellanic Cloud galaxy, which is approximately 169,000 light years from Earth. Which event produces a supernova? | the explosion of a massive star |
| Stars form from nebulae of dust and gases. Depending on its properties, a star may become a red, yellow, white, or blue star. Which property determines this star type? | mass |
| The Sun is a main sequence star. In several billion years, it is expected to change dramatically. When that happens, which effect will it most likely have on Earth? | Water will be boiled off of Earth. |
| Gas flows outward from the corona at high speeds and forms the | solar wind |
| Solar activity cycles occurs every ____ years | 22.4 |
| True or False: The state of matter found in the Sun’s interior is plasma. | True |
| What causes the dark bands observed in a solar spectrum? | different chemical elements which absorb light at specific wavelengths |
Created by:
ceadams00