Understanding Systematic and Random Errors

Understanding Systematic and Random Errors

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

This video tutorial by Ms. CM covers the concepts of random and systematic errors in experiments. Random errors are caused by unpredictable changes and can be reduced by conducting repeat trials and using precise apparatus. Systematic errors result from flaws in experimental design or apparatus, causing consistent deviation from the actual value. Examples of both types of errors are provided, along with methods to minimize their impact on experimental results.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a characteristic of random errors?

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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