What is a characteristic of random errors?

Understanding Systematic and Random Errors

Interactive Video
•
Chemistry
•
9th - 10th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
They are unpredictable and can be high or low.
They have a consistent direction.
They can be completely eliminated.
They are caused by a flaw in the experimental design.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an example of a random error?
Observer misinterpreting a reading.
Heat loss to surroundings.
Using a faulty thermometer.
Forgetting to zero a mass balance.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can random errors be reduced?
By using more accurate apparatus.
By conducting fewer trials.
By changing the experimental design.
By ignoring outliers.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the absolute uncertainty of a 20 cm cubed volumetric pipette?
±0.5 cm cubed
±0.08 cm cubed
±5 cm cubed
±1 cm cubed
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What causes systematic errors?
Observer bias.
Flaws in experimental design or apparatus.
Random fluctuations in measurements.
Unpredictable changes in conditions.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement is true about systematic errors?
They result in consistent measurement bias.
They cause random variations in data.
They are always due to human error.
They can be reduced by repeat trials.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an example of a systematic error in a titration?
Reading from the bottom of the meniscus.
Overshooting the endpoint.
Using a dirty burette.
Using a volumetric pipette.
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