Measurement and Data Analysis

Front

Measure the length of a line using a ruler and include units in your answer.

Back

5.50 cm

Front

Calculate the average length of Group A's data.

Back

Add all measurements and divide by the number of trials: (16.8 + 17.5 + 17.0 + 17.4) / 4.

Front

Calculate the average length of Group B's data.

Back

Add all measurements and divide by the number of trials: (15.5 + 15.0 + 13.0 + 19.5) / 4.

Front

Group B

Back

Group A

Front

Identify which set of data is more accurate if the actual length is 16.1 cm.

Back

Accuracy is determined by how close measurements are to the actual value. Compare each group's average to 16.1 cm.

Front

Convert the actual length of 16.1 cm to kilometers.

Back

Divide by 100,000 to convert cm to km: 16.1 cm = 0.000161 km.

Front

Choose the best type of graph for representing measurement data and justify your choice.

Back

A bar graph or line graph can be used to show changes or comparisons in data.

Front

Identify the independent and dependent variables in the ibuprofen hypothesis.

Back

Independent variable: Amount of ibuprofen. Dependent variable: Amount of stomach acid produced.

Front

Outline how to set up an investigation with experimental and control groups.

Back

Define experimental and control groups, and identify at least two constants to maintain.

Front

Explain the roles of control groups and constants in an experiment.

Back

Control groups provide a baseline for comparison, while constants ensure that only the independent variable affects the outcome.