During a lab students were asked to measure the volume of a liquid. Which of these should the students choose to measure with the most accuracy?
A. Incorrect. Image A is a test tube. It is should not be used for measurement of liquids. |
C. Incorrect. Image C is an Erlenmeyer flask. It is should not be used for measurement of liquids. |
B. Incorrect. Image B is a beaker. It is should not be used for measurement of liquids. |
D.  Correct! Image D is a graduated cylinder. It is the most precise way to measure the volume of a liquid. |
During a lab you were asked to find the density of the object below. You were told that you could find the density by dividing the mass of the object by the volume of the object. Which of the following pieces of equipment would you need to use to find the density of the object?
A. II only
Incorrect. A ruler can be used to calculate the volume of a regular shaped object but not an irregular shaped object such as this rock.
B. I and II only
Incorrect. A balance would be used to find the mass of the object and a ruler can be used to calculate the volume of a regular shaped object but not an irregular shaped object such as this rock.
C. I and III only
Correct! You would use a balance to find the mass of the object and then a graduated cylinder to find the volume of the irregular shaped object.
D. II and IV only
Incorrect. A ruler can be used to calculate the volume of a regular shaped object but not an irregular shaped object such as this rock. A beaker should not be used to measure volume.
During a lab you were asked to find the relative humidity. What instrument would you use to do this?
A. Anemometer
Incorrect. An anemometer is used to measure wind speed.
B. Psychrometer
Correct! A psychrometer is used to measure relative humidity.
C. Barometer
Incorrect. A barometer is used to measure air pressure.
D. Spring Scale
Incorrect. A spring scale is used to measure the force of a load.
Which of the following pieces of equipment is not correctly matched to its function?