6. A set of 500-g masses is placed one at a time on a digital balance during quality control testing. The mass reading are 397 g, 401g, 403 g. Describe the accuracy and precision of the scale. (1 point) Responses Precise but not accurate Precise but not accurate Not accurate and not precise. Not accurate and not precise. Accurate but not precise Accurate but not precise Both accurate and precise Both accurate and precise Question 7 7. A teacher has her students write down hypotheses after making an observation. Which is a testable hypothesis? (1 point) Responses Earthquakes and tornadoes occur at the same time. Earthquakes and tornadoes occur at the same time. Energy gets transferred among all organisms in the food chain. Energy gets transferred among all organisms in the food chain. If a person gets 8 hours of sleep at night, then their memory during the day will improve. If a person gets 8 hours of sleep at night, then their memory during the day will improve. All living organisms are made from at least one cell that begins during sexual reproduction.

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GPT-4o mini · Answer

**Question 6:** The set of mass readings (397 g, 401 g, 403 g) shows that all the readings are consistently close to one another, indicating precision. However, they are all significantly lower than the intended mass of 500 g, indicating a lack of accuracy. **Response:** Precise but not accurate. --- **Question 7:** A testable hypothesis is one that can be supported or refuted through experimentation and observation. Among the options provided, the hypothesis "If a person gets 8 hours of sleep at night, then their memory during the day will improve" can be tested through an experiment involving sleep duration and memory assessment. **Response:** If a person gets 8 hours of sleep at night, then their memory during the day will improve.