Question

9. Use dimensional analysis to determine how many centimeters are in 17 kilometers.
A. 17,000 cm
B. 1,700 cm
C. 1,700,000 cm
D. 170 cm


11. Diana would like to observe the movements of a paramecium. Which of the following tools would be best for Diana to use?
A. convex telescope
B. light microscope
C. scanning electron microscope
D. hand lens


13. Which of the following is an example of the proper use and conservation of lab materials?
A. Kyle weighs out exactly the amount of baking soda that he needs for an experiment before taking it to his lab area.

B. Sarah pours a large amount of ethanol into a beaker, measures out what she needs at her lab desk, and disposes of the rest.

C. Jeff pours vinegar from a bottle directly into his beaker and approximates the amount he needs without measuring.

D. Andrea weighs out twice the amount of salt that the lab requires in case she makes a mistake and needs more later.




16. Prior to using a triple beam balance, it is necessary to
A. make sure that the balance is calibrated to zero.
B. make sure that the pan is clean and dry.
C. make sure that the riders are all set to zero.
D. all of these