Unit 1 Exam Review: Intro. to Physical Science

Which of the following is true about the process in which scientists conduct science?

• There is a single process that all scientists follow.

• There is no single process, but there are important common steps in all good scientific investigations.

• Scientists do not follow any steps.

• The process is always the same for every experiment.

The hypothesis in a scientific investigation can be rewritten and tested multiple times before a final conclusion is reached.

• True

• False

Why should the experiment and conclusion in the scientific method be reproducible by others?

• To test the validity of the experiment and further support results.

• To make the experiment more complicated.

• To ensure only one person can perform the experiment.

• To keep the results secret from others.

What is quantitative data?

• Data that is descriptive

• Data that is numerical and organized into tables with measurements and calculations

• Data that is only used in physics

• Data that cannot be measured

In a line graph, the independent variable is placed on the ________ and the dependent variable is placed on the ________.

• x-axis; y-axis

• y-axis; x-axis

• origin; axis

• axis; origin

The car at the stop sign was stopped.

• Yes, the car was stopped.

• No, the car was moving.

• The car was reversing.

• The car was accelerating.

Observation: You’re an accident investigator. The accident you walk up on involves the two cars pictured below: Which car was traveling faster?

• Car A was traveling faster.

• Car B was traveling faster.

• Both cars were traveling at the same speed.

• It is impossible to tell from the picture.

What is the definition of measurement?

• The size, length, or amount of a substance.

• A method to increase temperature.

• A process of mixing chemicals.

• A way to create new substances.

Which system do all branches of science use for measurement?

• The International System of Measurement (SI Base Units)

• The Imperial System

• The Customary System

• The Metric Ton System

There are 2 types of data: Qualitative and Quantitative. Which of the following is a characteristic of qualitative data?

• Based on physical observations

• Expressed numerically

• Always uses units

• None of the above