Measuring Accuracy and Precision in Chemistry

What is the main focus of today's session?

• Learning how to measure

• Learning how to calculate

• Learning how to draw

• Learning how to write

What is the estimated measurement in the first ruler example?

• 20 cm

• 18 cm

• 10 cm

• 15 cm

Which of the following measurements would NOT be accepted for the first ruler example?

• 17 cm

• 19 cm

• 20 cm

• 18 cm

What is the best estimate for the second measurement example?

• 2.0

• 2.2

• 2.5

• 3.0

What is the key concept when using a protractor to measure angles?

• Using multiple estimates

• Using a single estimate

• Ignoring estimates

• Using two estimates

Which of the following is a correct estimate for the protractor example?

• 98

• 99.5

• 98.5

• 97.5

In the advanced protractor example, what is the best estimate for the angle?

• 99.0

• 98.4

• 100.0

• 97.0

Why can't you have two estimates in a measurement?

• It is allowed if the estimates are close

• It is allowed in some cases

• It makes the measurement more accurate

• It makes the measurement less accurate

What is the correct estimate for the final ruler example?

• 5.55

• 5.6

• 5.65

• 5.5

What should you do if you are unsure about a measurement?

• Ask someone else

• Ignore the measurement

• Make a single estimate

• Make multiple guesses