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- -- card: 45698 from stack: in
- -- bmap block id: 0
- -- flags: 4000
- -- background id: 7720
- -- name: #144
- ----- HyperTalk script -----
- on openCard
- global group,rightone
- put 13 into group
- put "B" into rightone
- pass openCard
- end openCard
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- -- part contents for background part 20
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- Question #13
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- -- part contents for background part 1
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- 4BC-2.1 When the earth's atmosphere is struck by a meteor, a cylindrical region of free electrons is formed at what layer of the ionosphere?
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- -- part contents for background part 11
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- The F1 layer
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- -- part contents for background part 27
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- The E layer
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- -- part contents for background part 28
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- The F2 layer
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- -- part contents for background part 29
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- The D layer
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- -- part contents for background part 43
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- Correct answer is B