题目

Physics 1 Hon - Bowles - p06/p07 CFE Practice - Nature of Science

多重下拉选择题

Clark steps outside on a winter North Dakota morning and throws a rock into the lake outside his tent. He sees that the rock does not sink. Clark forms a hypothesis about the behavior of rocks and water: The colder water is, the slower a rock will sink. Choose an experiment to best test this hypothesis. [ Select ] Get samples of water at a range of temperatures and place rocks of various sizes in each one. Verify if it will sink. Get samples of water at the same temperatures and place an identical rock in each one. Verify if it will sink. Get samples of water at a range of temperatures and place an identical rock in each one. Verify if it will sink. Get samples of water at the same temperatures and place rocks of various sizes in each one. Verify if it will sink. Predict whether this experiment will prove or disprove Clark’s hypothesis. [ Select ] Clark’s hypothesis indicating a continuous relationship would be disproved Clark’s hypothesis indicating a continuous relationship would be proved Clark’s hypothesis indicating a continuous relationship cannot be proved or disproved, If it would be disproved, what would be the revised hypothesis? Below 0°C, rocks do not sink in water.

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思路分析

First, I’ll restate the situation and the options you’re evaluating to keep the context clear. - The hypothesis: The colder water is, the slower a rock will sink. - Task: Choose an experiment to best test this hypothesis. - Then predict whether the experiment will prove or disprove the hypothesis and, if disproved, provide a revised hypothesis. Option 1: Get samples of water at a range of temperatures and place an identical rock in each one. Verify if it will sink. - Why this is a strong test: By varying temperature while keeping rock size and material constant, you isolate the variable of interest (water temperature) and control other factors. Using an identical rock across all trials minimizes confounding variables related to rock mass or surface area. - What it tests: If temperature affects sinking rate or whether the rock sinks at all, this setup should reveal a pattern (e.g., differences in sinking behavior across temperatures) attributable to temperature, supporting or refuting the ......Login to view full explanation