Experimental Procedure and Measurement Concepts

What should be done to present all quantitative data effectively?

• Use common laboratory apparatus

• Present data to an appropriate number of decimal places/significant figures

• Identify risks of the experiment

• Make predictions based on data

How precise can a half metre rule or metre rule record measurements?

• 0.1 cm

• 0.01 cm

• 1 cm

• 0.001 cm

• $ t_1 \times t_2 $

• $ t_1 - t_2 $

• $ t_1 + t_2 $

What is the recommended precision for recording time using a stopwatch in this experiment?

• 1 decimal place

• 2 decimal places

• 3 decimal places

• 4 decimal places

What is a factor that causes uncertainty in time measurement using a stopwatch?

• Human reaction time

• Stopwatch battery life

• Stopwatch brand

• Stopwatch color

What is typically plotted on the horizontal axis of a graph?

• Dependent variable

• Independent variable

• Control variable

• Random variable

What should the scales for the axes be chosen to do?

• Minimize the use of the graph paper

• Maximize the use of the graph paper

• Make the graph look symmetrical

• Ensure the graph starts at the origin

Which of the following is NOT the correct rule for tabulation of data?

• use the vertical column table

• show working and unit in cells

• include quantity and unit for headings

• give the required set of readings. If it is not stated, give at least 6 readings

Which statement correctly describes a best fit line?

• It should have equal number of points on either side of the line.

• It must pass through at least one point.

• The line should be smooth.

• All the points should be above the best fit line.

Which statement regarding the measurement of gradient is correct?

• You should use your data points to calculate gradient.

• You should use points on your best fit line that are NOT your data points.

• You should draw a small gradient triangle

• You should use soild lines to draw the gradient triangle