Scientific Measurements

Today we are just introducing how to use significant figures when making measurements.

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​The goal is that we must read a tool in a way that reflects how precise it is.

​Significant Measurements

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Multiple Choice

Which Ruler would allow me to be more precise in my measurement?

• Ruler A

• Ruler B

With Significant Measurements the first step is determining the scale of a tool.

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This means I need to know the value of the smallest graduations or "tick marks" on the tool​

​Significant Measurements

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Whatever the place value of these tick marks, my measurement needs to include it plus one more digit.

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​This is called my estimated figures or uncertainty figure. It must be included even if it is 0.

​Significant Measurements

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Multiple Choice

Read the volume using the correct significant figures.

• 26.5 mL

• 2.65 mL

• 2.6 mL

• 2.652 mL

Multiple Choice

Read the length using the correct significant figures.

• 1.68 cm

• 1.7 cm

• 16.8 cm

• 1.682 cm