Test — Test Answers

A scientist develops a new experiment to test atomic theory. His results do not agree with the theory. What will most likely happen next?

Which tool can be used to measure the volume of a liquid to one decimal place?

The hydrogen ion concentration of a vinegar solution is 0.00010 M. How is this concentration written in scientific notation?

Zachary adds 26.64 g to 12.557 g. How many significant figures should his answer have?

Which statement correctly compares a hypothesis and a theory?

Which tool was most likely used in a procedure if the lab report shows that approximately 300 mL of water was used?

The mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 1023. Which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

The teacher prepares 2.50 liters (L) of a salt solution for a class experiment. How many quarts (qt) are in 2.50 L? (1 L =1.06 qt)

What is one advantage of using a computer over a graphing calculator?

Which statement summarizes the difference between a law and a theory?

How would you write 16,340 in scientific notation with 2 significant figures?

Randy observed that cooked onions in his food taste very differently from the raw onions that he had on his salad. He wondered why that was so. He thinks that he has an idea, but he is not sure. What has he developed in his mind?

Which of these statements correctly compares probeware (such as an electronic temperature probe) to traditional analog tools (such as a liquid-based thermometer)?

A student is creating a table that compares theories, hypotheses, and laws. TheoryHypothesisLawIs supported by many observations Can be tested Is falsifiable Explains observations In which row should the student enter “No” in the column for Law?

How many milliseconds (ms) are there in 3.5 seconds (s)?

In general, which type of scientific knowledge or understanding is least well supported?

Isabel wants to determine the mass of a metal block. What is the SI unit for mass?

Henry divides 1.060 g by 1.0 mL to find the density of his water sample. How many significant figures should he include in the density value that he reports?

Silus wants to monitor the temperature of a reaction every 0.5 seconds for 30 minutes. He plans to generate a graph of the temperature values over time and insert the graph into a text document. Which pair of tools would be best for Silus to use?

Which of these units is most appropriate to use when measuring the mass of a person?