11.   We design and perform an experiment, or make observations, according to a preformed set of ideas or concepts in our mind.

12.   We will perform the experiment as before, but this time in pitch darkness.

13.   Each experiment is performed twice to ensure accuracy.

14.   The experiments were performed in order to test for the following experimental hypotheses.

15.   A second experiment is then performed to calibrate the calorimeter.

16.   I merely want you to perform an experiment.

17.   These experiments were performed on conscious dogs supported by Pavlov harnesses.

18.   Each experiment was performed in duplicate on each dog.

19.   Experiments were performed on seven subjects to determine the accuracy of the method for measuring oesophageal bicarbonate content.

20.   These experiments were performed on Sprague-Dawley rats.