Measurements in Chemistry

This bullseye demonstrates...

• High Accuracy & High Precision
• High Accuracy & Low Precision
• Low Accuracy & High Precision
• Low Accuracy & Low Precision

Tags

NGSS.HS-PS2-1

Describe the accuracy and precision of the image

• Accurate and Precise
• Accurate and not precise
• Not Accurate and Precise
• not accurate and not precise

Which group of measurements  is the most precise? (Each group of measurements is for a  different object)

• 2.0 g, 3.0 g, 4.0 g
• 1 g, 3 g, 5 g
• 2 g, 2.5 g, 3 g
• 2 g, 3 g, 4 g

A student determined the density of aluminum by averaging the results of three density calculations. Each value was different, but the average was equal to the accepted value for aluminum’s density. The results of this investigation are best described as

• accurate, but not precise.
• precise, but not accurate.
• both precise and accurate.
• neither precise nor accurate.

In the measurement 0.503 L, which digit is the estimated digit?

• 5
• 3
• the 0 immediately to the left of the 3
• the 0 t the left of the decimal point

At which point should the reading on this instrument be taken?

• Highest
• Left Side
• Right Side
• Meniscus 

Measure to the nearest milliliter.

• 73 mL
• 73.1 mL
• 76 mL
• 76.1 mL

What is the name of the variable shown to be 60.5mL in this image?

• Vi
• Vf
• Vs
• V

What is the name of the variable shown to be 50.0mL in this image?

• Vi
• Vf
• Vs
• V

What math should be done to find the volume of the green jade sample?

• Vi-Vf
• Vf+Vi
• Vf-Vi
• Vf x Vi