Sun quiz
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Which is about five times hotter than the Sun's surface?
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More questions about Sun
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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What causes the northern lights?
Answer: Solar wind
Why: The colors come from Earth's own air: oxygen glows green and red, while nitrogen adds blue and purple.
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What share of the Solar System's mass is in the Sun?
Answer: 99.8%
Why: Of the little mass left outside the Sun, more than 90% belongs to just two planets: Jupiter and Saturn.
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Which element heavier than helium is most abundant in the Sun?
Answer: Oxygen
Why: Oxygen accounts for about 1% of the Sun's total mass, making it more common there than carbon and iron combined.
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What does sunlight help your skin make?
Answer: Vitamin D
Why: Skin makes vitamin D from the UVB part of sunlight, and UVB does not get through ordinary window glass.
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What halo around the Sun appears in a total eclipse?
Answer: The corona
Why: This faint outer atmosphere is typically 1 to 2 million °C, while the surface below it is only about 5,500 °C.
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What mass does the Sun turn into energy each second?
Answer: About 4 million tonnes
Why: Each helium nucleus made in the core weighs about 0.7% less than the four hydrogen nuclei that formed it, and that lost mass is the energy.
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