alleryMixed answers about air in an upturned glass show
Astudents always know best
Bonly teachers know science
Cglasses cannot teach science
Dalternative conceptions exist
Answer & Solution
Correct answer: D. alternative conceptions exist
1. Students knew the general statement 'air is everywhere'.
2. When asked to apply it to an upturned glass, some said no air remained.
3. This reveals alternative conceptions, which questioning helps clear.
_Source: NCERT, Position Paper of the National Focus Group on Teaching of Science, Asking questions_
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