Question

1. drag and drop the terms to complete the diagram of the life cycle of an average - sized star.

choices
white dwarf
red giant

Explanation:

To solve the star life cycle diagram:

1. Recall the life cycle of an average - sized star (like our Sun). The stages are: star - forming nebula → average - size star (main sequence) → red giant → planetary nebula → white dwarf.
2. The lower dashed box (after planetary nebula) should be filled with "white dwarf" because after a planetary nebula is ejected from a red giant, the remaining core becomes a white dwarf. The upper dashed box (before star - forming nebula? Wait, no, the cycle is star - forming nebula → average star → red giant → planetary nebula → white dwarf → back to star - forming nebula? Wait, no, the correct cycle for an average - sized star:

• Start with a star - forming nebula (where stars are born).
• Then the star becomes an average - size star (main sequence).
• After that, it expands into a red giant.
• Then it sheds its outer layers as a planetary nebula.
• The remaining core is a white dwarf.
• Eventually, the white dwarf cools and fades, and the matter can re - enter a star - forming nebula, but in the given diagram, the lower dashed box (connected to planetary nebula) should be "white dwarf" and the upper dashed box (connected to average star size and star - forming nebula) should be "red giant"? Wait, no, let's re - examine the diagram structure. The arrows: star - forming nebula → average star size → [upper dashed box] → planetary nebula → [lower dashed box].
• The stage after the average - size star (main sequence) is the red giant. So the upper dashed box (between average star size and planetary nebula) should be "red giant".
• The stage after planetary nebula is the white dwarf, so the lower dashed box (after planetary nebula) should be "white dwarf".

Answer:

• Upper dashed box: red giant
• Lower dashed box: white dwarf