Question 9 • 26/27 EARTH & SPACE SCIENCE A
The solar wind begins when electrically charged particles flow outward from the Sun’s corona (step 3). They spread outward through space as far as Saturn (step 2), and the particles travel along magnetic-field lines (step 4). When they collide with gas atoms, those atoms give off light (step 1), so the sequence is 3, 2, 4, 1: choice C.
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