10 Questions
What is the main cause of random errors in measurements?
Incorrect reading of the measuring instrument
How can the effect of random errors be reduced in an experiment?
Repeating the experiment and calculating the mean of the results
What is the main difference between random errors and systematic errors?
Random errors affect the precision of the results, while systematic errors affect the accuracy
Which of the following is an example of a potential random error in the student's investigation?
The student could incorrectly read the scale on the measuring cylinder
Which of the following is an example of a potential systematic error in the student's investigation?
The measuring cylinder used is too large for the volume of acid being measured
What is the main effect of random errors on the results of an experiment?
They make the results less precise
Which of the following is the best way to reduce the effect of systematic errors in an experiment?
Carefully designing the experimental method
What is the main effect of systematic errors on the results of an experiment?
They make the results less accurate
Which of the following is an example of a potential random error in the student's investigation?
The student could incorrectly read the scale on the measuring cylinder
Which of the following is the main purpose of repeating an experiment and calculating the mean?
To reduce the effect of random errors
Study Notes
Random Errors
- Random errors occur due to incorrect timing or instrument reading by the person conducting the measurement.
- Examples of random errors include:
- Difficulty in reading the scale of a measuring cylinder when measuring small volumes (e.g., 25 cm3 of hydrochloric acid).
- Incorrect reading of the scale by the person conducting the measurement.
- Fluctuations in environmental factors, such as temperature, which can affect the results of the investigation.
- Random errors can either increase or decrease the result, and can be reduced by repeating the experiment and calculating a mean for the set of data.
Systematic Errors
- Systematic errors occur due to a faulty or poorly designed experimental method.
- Examples of systematic errors include:
- Errors resulting from a poorly designed experimental method, as shown in the student's investigation.
- Other potential systematic errors that can occur in the investigation.
Learn about random errors in measurements, caused by mistakes made by the person conducting the measurement. Explore examples of random errors and potential sources of error in a student's investigation.
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