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Which observation is recorded in chronological order?

Answer and explanation

Correct answer: Bubbles formed first then the liquid changed colour

The direct answer is A: bubbles formed first, then the liquid changed colour. Chronological order means recording events in the order in which they happened, from earlier to later. The words “first” and “then” explicitly show that sequence, so the statement is an observation arranged by time. Option A is correct because it reports two observable events and their order without adding a personal judgment. Option B is wrong because “beautiful” and “nice” are subjective opinions, and no time sequence is given. Option C is wrong because “I felt so” is a personal belief, not an objective observation or chronological record. Option D is wrong because saying the experiment was easy gives an opinion and does not tell what happened first or later. Scientific records should use clear, observable descriptions and, when useful, times or sequence words. Memory cue: chronological means time order—first, next, then, finally.

Related tags

Chronological OrderBubblesColour ChangeScientific Questions And ObservationsExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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