Sources of Error in Experiments
Biology ⇒ Scientific Inquiry and Experimental Design in Biology
Sources of Error in Experiments starts at 8 and continues till grade 12.
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See sample questions for grade 9
A student consistently adds 2 mL extra water to each test tube by mistake. What type of error is this?
A student forgets to zero the balance before weighing a sample. What type of error does this introduce?
A student measures the temperature of a solution but reads the thermometer from above instead of at eye level. What type of error is this?
A student records the time for a reaction but starts the stopwatch late. What type of error is this?
A student consistently adds 2 mL extra water to each test tube by mistake. What type of error is this?
A student forgets to zero the balance before weighing a sample. What type of error does this introduce?
A student measures the temperature of a solution but reads the thermometer from above instead of at eye level. What type of error is this?
A student records the time for a reaction but starts the stopwatch late. What type of error is this?
Which of the following is a way to minimize human error? (1) Use more sensitive equipment (2) Follow a written procedure carefully (3) Increase the sample size (4) Use a control group
Which of the following is a way to reduce systematic errors? (1) Use more trials (2) Calibrate instruments before use (3) Increase sample size (4) Use a stopwatch
Which of the following is an example of a random error? (1) A miscalibrated pH meter (2) Variations in room temperature (3) Always reading a burette from above (4) Using the wrong chemical
Which of the following is an example of a random error? (1) A scale that always reads 2g too high (2) Fluctuations in temperature during an experiment (3) Using the wrong chemical (4) Misreading a label
Fill in the blank: __________ errors are caused by flaws in the design or setup of the experiment.
Fill in the blank: __________ errors are caused by unpredictable and uncontrollable factors.
Fill in the blank: __________ errors are often due to mistakes in reading instruments or recording data.
Fill in the blank: __________ errors can be minimized by careful technique and attention to detail.
Systematic errors always affect results in the same direction. True or False?
True or False: All errors in experiments are due to carelessness.
True or False: All errors in experiments can be completely eliminated.
True or False: Human error is a type of experimental error.
