Question

describe a general rule for predicting the motion of an object that is being pushed or pulled by unbalanced forces?

Answer 1

7th grade activities

Force and Motion

(with Work)

 

2010-2011

 

 

Outline of Topics:

1.     Describing Motion: Graphing, Speed and Velocity 

2.   Describing Motion: Changing Velocity

3.   Forces, Their Sizes and Direction

4.   Force and Mass

5.   Its a grave matter: gravity and inertia

6.   Weight and Mass

7.   All work and no play: Work and Energy

 

Appendices

1:  7th Grade Vocabulary Related to Force and Motion

2:  Motion Detector Directions

3:  Day 1 Graphs with Focus Question at the End

4:  Day 1 Data Collection Sheet

5:  Day 2 Student Problem Sheet

6:  Day 2 Second Set of Problems

7:  Day 2 Graphs for is the Velocity Changing

8:  Day 3 Student Tables with Questions

9:  Day 4 Frame for Science Notebook

10:  Day 5 Skateboard Prediction and Actual Sheets

11:  Day 6 Data Table

12: Day 7 Student Handout

13: Day 7 Force Arrows

14:  Day 8 Data Analysis

15:  Uncovering Student Ideas in Physical Science probes

16:  National Enquirer advertisements

17: Excerpt from Joy Hakim’s The Story of Science: Newton at the Center, pages 172-183

18:  Directions for converting You Tube videos to another media file

 

First topic:  Describing motion

A three-day exercise

Learning goals

Reviewed from 6th grade (day 1):

I can interpret a position versus time line graph to determine types of one-dimensional motion of an object.

I can draw a position versus time line graph given appropriate data.

I can represent changes in motion in a variety of ways, including words, motion arrows, graphs, and by acting out.

(Day 2) I can use the information in a position vs. time graph to determine the speed of an object.

New for 7th grade: I can define velocity.

(Day 3) I can distinguish between speed and velocity.

 

Topic Word Bank

Speed Motion Velocity Direction Position Graph Distance Vertical Time Horizontal Rate of change Representation Slope              Negative                Positive

 

Sequence of Experiences Day 1: Interpretation of a Position/Time Graph Pairs and whole group 10 minutes Day 1: Creation of a Position/Time Graph Lab groups and whole group 25 minutes Day 1: Making Sense of Multiple Representations Whole Group 10 minutes Day 2: Calculating Speed Pairs and whole group 23 minutes Day 2: Differentiating Speed and Velocity Pairs and whole group 18 minutes Day 2: Exit Slip Individually 5 minutes Day 3 Intro Whole class 3 minutes Day 3:Collecting Initial Data In pairs 12 minutes Day 3:Interpreting Data Parts 1 and 2 In pairs, then groups of 4 20 minutes Day 3: Student Challenge     Day 3: Class Discussion Whole class 7 minutes Day 4: Intro     Day 4:Interpreting Data Parts 3, 4 and 5 Whole class   Day 4: Processing Information Individual and Paired   Day 4: Class Discussion Whole Class   Day 4: Exit Slip Individually 3 minutes

Day 1  Focus Question:  What can be learned from different representations of motion?

Materials and Preparation:

For the class: