IG Phy – Stars (I)
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Question 1 of 15
1. Question
1 point(s)The Sun is a medium-size star consisting mostly of hydrogen and helium.
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Question 2 of 15
2. Question
1 point(s)Blue stars are hotter than red stars.
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Question 3 of 15
3. Question
1 point(s)Nuclear fusion reactions in the Sun\’s core produce energy by fusing helium nuclei.
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Question 4 of 15
4. Question
1 point(s)The temperature in the core of the Sun is approximately 15 million °C.
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Question 5 of 15
5. Question
1 point(s)The Milky Way galaxy consists of approximately 100 billion stars.
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Question 6 of 15
6. Question
1 point(s)The nearest star to our Sun is 4.2 light-years away.
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Question 7 of 15
7. Question
1 point(s)One light-year is the distance light travels in one year in a vacuum.
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Question 8 of 15
8. Question
1 point(s)The material of a white dwarf can be 200,000 times denser than water.
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Question 9 of 15
9. Question
1 point(s)The surface temperature of Sirius B is about 25,000°C.
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Question 10 of 15
10. Question
1 point(s)The mass of a white dwarf cannot exceed 1.44 times the mass of the Sun.
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Question 11 of 15
11. Question
1 point(s)Most of the yellow-colored stars are similar to our Sun.
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Question 12 of 15
12. Question
1 point(s)Stars can only be observed in our galaxy, the Milky Way.
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Question 13 of 15
13. Question
1 point(s)A supernova occurs when a star explodes at the end of its life cycle.
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Question 14 of 15
14. Question
1 point(s)The life cycle of a star does not depend on its mass.
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Question 15 of 15
15. Question
1 point(s)Sirius B, a white dwarf, has a diameter similar to that of Earth but a mass almost that of the Sun.
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