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Students will learn how forces of push and pull can change speed or direction.
Instructional Procedures Activity
The forces of push and pull cause changes in a speed or direction of objects. When a greater force is applied, the change in speed or direction will be greater also.
1. Use a Science Process and Thinking Skills
2. Manifest Scientific Attitudes and Interests
3. Understand Science Concepts and Principles
4. Communicate Effectively Using Science Language and Reasoning
Pre-Assessment/Invitation to Learn
Prepare and perform the following demonstration
The sock filled with the rice remains the same weight. As force (washers) is added to the paperclip, it reaches the point where the force is enough to move the weight. The greater the amount of force (number of washers), the greater the effect on the weight (sock); thus making the sock move across the tabletop and over the edge more quickly.
Tape the dowels together at each end.
Some balls are all the same size but they are not all the same weight. The weight of each ball helps to determine how it will react when it collides with another ball. The materials used to make each ball will also affect the experiment. Some materials absorb more energy
Science -What a Load! (ILO 1)
The force of the car remains the same. Additional weight is added to each run. At first, the amount of washers (weight) added does not affect the toys performance. Later on, each additional washer (increased weight) makes it more and more difficult to move the load. Finally, the load (weight/washers) cannot be moved by the amount of force applied.
Homework & Family Connections
Have the students make their own collision zones with the balls they have at home.
Did the students complete the Collision Zone chart accurately? Did their predictions become more accurate the further they moved down the chart?