Forces and Motion – Part 1 – Forces and Inertia Unit
Mark Sailer
Science Teacher
Pioneer Jr-Sr High

Days to complete unit 5-7 days Due Date/Test Day: November 11

Study Guidelines

• Explain the relationship between mass and inertia.
• Distinguish between balanced and net forces.
• Describe Newton’s First Law of Motion.
• Explain how friction affects motion.

Indiana State Grade 7 Science Standards and Benchmarks addressed by this unit:

7.3.17 - Investigate that an unbalanced force, acting on an object, changes it speed or path of motion or both, and know that if the force always acts toward the same center as the object moves, the objects path may curve into an orbit around the center.

C Layer Assignments (65 points Maximum)

1.  Which ball has more inertia?  Activity – Be prepared to discuss answers (5 points) 1.  _____

2.  Forces Foldable (5 points)       2.  _____

3.  Inertia Foldable (5 points)       3.  _____

4.  Friction Foldable (5 points)       4.  _____

5.  First Law of Motion Activities – Be prepared to discuss activity and answers

A.  First Law Magic (5 points)      5A _____

B.  The Coin in a Cup (5 points)      5B  _____

C.  First Law Skateboard (5 points)      5C  _____

D.  Around and Around (5 points)      5D  _____

6.  Observing Friction p.354 (5 points)      6. _____

7.  Lab Activity – Static and Sliding Friction (10 points)    7. _____

Answer p. 355 #1-5.Be prepared to discuss answers (5 points) 8.  _____

9. Homework - Notebook worksheets p. 140-142

Complete and be prepared to discuss answers (10 points)  9.  _____

10.  Homework - Section 1 Reinforcement Worksheet –

Be prepared to discuss worksheet (5 points) 10. _____

11. Create a poster or display to teach others what you have learned during this unit.

(20 Points)  - Be sure to look at the scoring guide before you begin. 11. _____

B Layer Assignments (Choose one – 15 points Maximum)

1.  Create a Mobile that has at least 3 arms.  Be creative and make sure each arm is balanced.  Be prepared to discuss your mobile.

2.  Create a Device to measure inertia of an object.

3.  What kinds of surfaces have the largest static and sliding friction?  Conduct an investigation.

A Layer Assignments (Choose one – 20 points Maximum) – Use an A Layer Research Form

1.  Make a timeline showing and describing the important events in the life of Galileo.

2.  Choose a part of an automobile that is affected by friction.  Identify the type of friction, whether the friction decreases or increases the efficiency of the car, and how the friction can be increased or decreased to improve the performance of the car.

3.  How has biomechanics been used to reduce job related injuries?

C Layer Points Earned _________ B Layer Points Earned __________   A Layer Points Earned __________

Grades   40-55 D  56-70  C  71-85 B  86+ A  Total _______________