GLE 34—Recognize the importance of communication among scientists about investigations in progress and the work of others A scientist makes an important discovery while conducting an experiment. What should the scientist do next?
A. Tell other scientists about the experiment and the discovery.
B. Tell other scientists about the discovery but not about the experiment.
C. Tell other scientists about the experiment but not about the discovery.
D. Write about the discovery in his or her notebook but not tell any other scientists about it.
Correct response: A Science as Inquiry - Understanding Scientific Inquiry
GLE 36—Explain why an experiment must be verified through multiple investigations and yield consistent results before the findings are accepted A scientist performed an experiment that had an unexpected result. Before telling anyone about the result, the scientist performed the experiment again. What is the most likely reason the scientist performed the experiment more than once?
A. The scientist wanted to make sure no one else could do the experiment.
B. The scientist had extra chemicals and wanted to use them all.
C. The scientist wanted to be sure the results were accurate.
Use this element from the periodic table to answer the question.
What is the atomic mass for silicon?
Correct response: C
Physical Science - Properties and Changes of Properties in Matter
GLE 12—Determine the effect of particle size of the same reactants on the rate of chemical reactions during a lab activity (e.g., powdered vs. solid forms)
A scientist has two samples of the same chemical: one sample is a solid block, and the other sample is a powder. The scientist puts the solid block in a beaker of water and observes a reaction.
What would most likely happen if the scientist placed the powdered sample into a different beaker of water?
A. No reaction would occur.
B. A completely different reaction would occur.
C. The same reaction would occur but at a faster rate.
D. The same reaction would occur but at a slower rate.
Correct response: C Physical Science - Motions and Forces
GLE 15—Explain why velocity is expressed in both speed and direction A scientist is trying to track the movement of a rocket. What information does the scientist need to determine the velocity of the rocket?
C. the time the rocket has been traveling and the mass of the rocket
D. the time the rocket has been traveling and the direction the rocket is moving
Correct response: B
Physical Science - Motions and Forces
GLE 16—Compare line graphs of acceleration, constant speed, and deceleration Mrs. Wilson’s science class is graphing the movement of vehicles passing their school. Which line graph shows a vehicle slowing down?