Test — Test Answers

In what way would a digital thermometer be preferable to those from a liquid-based thermometer?

Mary performs this calculation.How many significant figures should her answer have?

Juana performs the calculation below.6.05 + 3.156 + 5.0How should she report the answer using the correct number of significant figures?

What is the correct way to write 0.0000250 m in scientific notation?

Rita divides Avogadro’s number (approximately 6.02214 1023) by 2.055 to calculate the number of atoms in a sample. Which expression gives her result to the correct number of significant figures?

Which tool can be used to determine the volume of a metal bolt?

Which of the following values is equal to 1 micrometer?

Henry plans to monitor the change in concentration of an acid during a chemical reaction. He wants to collect data every 0.1 seconds and then to graph his data and insert it into a text document. Which pair of tools would be best for Henry to use?

A series of experiments, which are repeated over and over, seem to suggest that a scientific theory is incorrect. What does this most likely mean?

Scientists described light as a wave because the results of many experiments with light demonstrated that light behaves as a wave. Light is now described as having properties of both a wave and a particle. What is the most likely reason why this change was made?

A student is creating a table that compares theories, hypotheses, and laws. TheoryHypothesisLawIs testable Is falsifiable Is used to make predictions Provides explanations In which row should the student enter “Yes” in the columns for Theory and Hypothesis only?