There are three different difficulty levels in the Concept Builder. Those three difficulty levles are differentiated as follows:

**Apprentice**: Question Groups 1-4 Four Question Groups involving possible changes in kinetic energy and gravitational potential energy; the physical situations may be simpler than subsequent levels.**Master**: QuestionGroups 1-8 Eight Question Groups involving possible changes in kinetic energy and gravitational potential energy; the physical situations include the first four plus four additional situtions that may be slightly more complicated than the first four situations.**Wizard**: QuestionGroups 1-12 Eight Question Groups involving possible changes in kinetic energy and gravitational potential energy; the physical situations include the first eight plus four additional situtions that may be slightly more complicated than the first four situations.

The questions from each group are shown below. Teachers are encouraged to view the questions in order to judge which activities are most appropriate for their classes. We recommend providing students two or more options.

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Read the description of the motion of the bold-faced object and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increases, decreases, or remains constant.

A

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

An

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

A

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

A

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

A

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

A

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

As soon as the starting gun sounded out, a

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

As soon as the light turned green, the driver stepped on the gas and the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

Once cleared for takeoff, the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

Upon leaving the bat, the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

Upon leaving her club, the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

In the three seconds after leaving the bat, the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The passengers screamed as the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

Anna Litical released the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

After Dad released the swing from its highest position, he watched his

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The driver stepped on the gas and the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

It took a lot of effort, but

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

Using everything he had,

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The passengers screamed as the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

When the driver reached the crest of the hill, she saw the stop light turn red and slammed on the brakes. The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

During the last 40 meters down the hill, the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The high-speed

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

When the batter hit the foul ball, the

Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

After takeoff, the