Question

1. you see the ______ when you look at an image of the sun.
2. you see the middle layer of the sun’s atmosphere, the ______, at the start and end of a total eclipse.
3. the corona sends out a stream of charged particles called the ______.
4. the solar wind can interact with earth’s magnetic field to create powerful electric currents that cause ______ near the poles.
5. about three fourth’s of the sun’s mass is ______.

Explanation:

The problem involves questions about the sun's structure, solar wind, and sun's mass, which are topics in Astronomy (a subfield of Natural Science, specifically Physics or Astronomy which can be under Natural Science's "Others" or related to Physics). For question 10: The sun's mass composition - about three - fourths of the sun's mass is hydrogen (and the remaining is mostly helium, but the main component for three - fourths is hydrogen). For question 9: Solar wind interacting with Earth's magnetic field causes auroras (aurora borealis in the north pole, aurora australis in the south pole) near the poles. For question 8: The corona sends out a stream of charged particles called the solar wind. For the middle layer of the sun's atmosphere - the chromosphere is the middle layer (photosphere is the inner, chromosphere middle, corona outer), and during a total eclipse, the chromosphere can be seen. For the first two (partially visible), when looking at the sun's image, the photosphere is the visible surface, and the chromosphere is seen during eclipse start/end. But focusing on question 10: The sun is mostly made of hydrogen (about 75% by mass) and helium (about 25% by mass). So about three - fourths (75%) of the sun's mass is hydrogen.

Answer:

Question 10: hydrogen (For other questions: Question 9: auroras; Question 8: solar wind; Middle layer of sun's atmosphere: chromosphere)