Understanding Measurement and Science

What is the SI unit for length?

• meter

• millimeter

• kilometer

• centimeter

Define the term 'hypothesis' in the scientific method.

• A hypothesis is a testable prediction about the relationship between variables in the scientific method.

• A hypothesis is a random guess without any basis in research.

• A hypothesis is an untestable theory that cannot be proven.

• A hypothesis is a definitive conclusion drawn from experiments.

What is the difference between accuracy and precision?

• Accuracy is about correctness; precision is about consistency.

• Accuracy is about the number of attempts; precision is about the time taken.

• Accuracy is subjective; precision is objective.

• Accuracy measures the average; precision measures the maximum.

List three common units of measurement for mass.

• grams, kilograms, pounds

• liters

• seconds

• meters

What is the first step in the scientific method?

• Conduct an experiment

• Formulate a hypothesis

• Make an observation or ask a question.

• Analyze the data

How can you improve the precision of a measurement?

• Use a ruler to measure without any markings.

• Estimate the measurement based on previous experiences.

• Ignore the calibration process altogether.

• Use precise instruments and calibrate them regularly.

What unit is commonly used to measure temperature in science?

• Kelvin

• Celsius

• Fahrenheit

• Rankine

Explain the importance of a control group in an experiment.

• The control group allows for comparison and helps isolate the effects of the independent variable.

• The control group is only necessary for qualitative research, not quantitative.

• The control group is used to increase the sample size of the experiment.

• The control group is irrelevant and does not affect the outcome of the experiment.

What does it mean if a measurement is accurate?

• A measurement is accurate if it is close to the true value.

• A measurement is accurate if it is easy to obtain.

• A measurement is accurate if it is based on opinion.

• A measurement is accurate if it is always the same.

Identify the step in the scientific method where data is analyzed.

• Conclusion

• Analysis

• Observation

• Hypothesis