Year 8 Science Inquiry Quiz 3

What are the four key concepts used to evaluate the quality of data in scientific experiments?

• Reliability, validity, precision, accuracy

• Speed, efficiency, cost, time

• Length, width, height, depth

• Color, texture, shape, size

Which concept is demonstrated by having consistent results in repeated experiments?

• Validity

• Precision

• Reliability

• Accuracy

Diagram showing different levels of reliability and validity with target illustrations.

• High reliability, high validity

• High reliability, low validity

• Low reliability, high validity

• Low reliability, low validity

What is the definition of reliability in experimental measurements?

• The degree of accuracy in your measurements

• The degree of consistency of your experimental measurements

• The degree of variability in your results

• The degree of precision in your calculations

In the pendulum practical, how can reliability be assessed?

• By changing the string length each time

• By repeating the experiment multiple times with the same string length

• By using different pendulums for each trial

• By measuring the angle of swing

Why is it important to increase the number of trials in an experiment?

• To make the experiment more complex

• To ensure the results are consistent and reliable

• To reduce the time taken for the experiment

• To use more resources

What is the definition of validity in an experiment?

• A measure of how closely the results of an experiment reflect what they should.

• A measure of how quickly an experiment can be completed.

• A measure of how many variables are used in an experiment.

• A measure of the cost of conducting an experiment.

Why is consistency in the angle of release important in the pendulum experiment?

• To ensure the experiment accurately tests the effect of string length on the time for one swing.

• To make the experiment more visually appealing.

• To reduce the cost of the experiment.

• To increase the speed of the pendulum.

What is the definition of precision in measurements?

• How close measurements are to a standard value.

• How close measurements repeated under the same conditions are to each other.

• The accuracy of a single measurement.

• The speed at which measurements are taken.

In the pendulum practical, what demonstrates precision?

• The length of the string.

• The weight of the pendulum.

• Times recorded for one swing are very close to each other in repeated trials.

• The color of the pendulum.