Intro to Science Review VL

Why do scientists use models of natural systems?

• Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly.

• Scientists use models of natural systems because they like to use art in science.

• Scientists use models of natural systems because the models are more accurate than the actual system.

• Scientists use models of natural systems because models work exactly the way these systems do in nature.

A scientist is studying a new chemical he hopes will prevent insects from eating raspberry bushes. He sprays the chemical on a raspberry bush and places it with an unsprayed blackberry bush and some insects in a sealed room. He observes insects eating the blackberry bush, but not the raspberry bush. He concludes that the chemical works. This situation is an example of

• a controlled experiment.

• cultural bias.

• skepticism.

• experimental bias.

Why do scientists use the International System of Units (SI)?

• because the SI is based on the metric system

• because the tools scientists use only measure in SI units

• so they can communicate their results without confusion

• so all scientists are guaranteed to come up with the same measurements

When entering a science lab, which of the following should be done by science students?

• Students should start working on their experiment.

• Students should figure out how the equipment works so that they are prepared for the experiment.

• Students must wait for their teacher to give instructions.

• Students must talk to their lab partner to see what they need to do next.

A student measures the mass of a paper clip. The student’s data table is shown here. The accepted value for the paper clip’s mass is 1.14 g.

Which of the following best describes the student’s measurements?

• The student’s measurements were accurate, but not precise.

• The student’s measurements were both accurate and precise.

• The student’s measurements were neither accurate nor precise.

• The student’s measurements were precise, but not accurate.

Which component of the technological system is achieved when an automobile airbag inflates?

• input

• process

• output

• feedback

How can surveying reading material improve your comprehension?

• Knowing the main ideas ahead of time helps you know where to focus your attention.

• Reading ahead makes studying go faster.

• Reciting the answers to questions out loud will help you remember them.

• Surveying ahead of time means you can skip maps, diagrams, and content summaries later.

If the trend in the graph continues through the summer, what would you expect the average high temperature in Louisville, Kentucky, to be in August?

• 66ºF

• 83ºF

• 103ºF

• 125ºF

An advertisement claims that three out of five dentists prefer a particular type of toothpaste. After researching the study, you find that the toothpaste company paid for it. Why should you be skeptical of the advertisement’s claims?

• because the dentists are showing experimental bias

• because only dentists were involved in the study

• because the organization that paid for the study is biased

• because you do not like the toothpaste being advertised

If a bowling ball were moved from Earth to the moon, how would its weight and mass change?

• The bowling ball would weigh the same, but its mass would increase.

• The bowling ball would weigh the same, but its mass would decrease.

• The bowling ball would weigh less on the moon, but its mass would stay the same.

• The bowling ball would weigh more on the moon, but its mass would stay the same.