Practice Understanding Uncertainties and Errors in Measurements - 11.1 | Chapter 11: Measurement and Data Processing | IB Grade 12-Chemistry
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11.1 - Understanding Uncertainties and Errors in Measurements

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the definition of accuracy?

💡 Hint: Think about how close your measurement is to what is known as correct.

Question 2

Easy

How do we express absolute uncertainty?

💡 Hint: Look at how you might report a measurement like weight or volume.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What term describes the closeness of a measured value to the true value?

  • Precision
  • Accuracy
  • Reliability

💡 Hint: Think about what makes a measurement reliable.

Question 2

Are systematic errors consistent?

  • True
  • False

💡 Hint: Remember how these errors differ from random variations.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A student measures the same liquid three times, getting 50.0 mL, 50.1 mL, and 50.2 mL. Calculate the average volume and the percentage uncertainty of the average.

💡 Hint: First, find the average and then consider how many measurements you took.

Question 2

In an experiment, you weigh a sample four times, getting results of 12.35 g, 12.40 g, 12.38 g, and 12.37 g. Determine the average mass and the absolute uncertainty of that average.

💡 Hint: Determine the average and then see how closely the repeated results cluster.

Challenge and get performance evaluation