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Students will create Zoom Balls to understand how sometimes both forces of push and pull need to be used at the same time.
Videos: (Available from Jordan School District)
The Zoom Ball shows how the forces of push and pull work together. When partner one pulls the cords outward on the end, the Zoom Ball goes flying as long as partner two on the other end keeps the cords in by pushing. The pushing action of the cords against the opening of the bottle sets it into motion. After the Zoom Ball reaches partner two, he sends it back by pulling on the cords while partner one pushes on the cords. Notice that one partner is always doing the opposite of the other. If both partners pull, the Zoom Ball will go to the middle because of equal forces on the Zoom Ball. When both partners push, keeping the cords in, the Zoom Ball does not move. It takes opposite forces working together to make the Zoom Ball work.
1. Use science process and thinking skills
2. Manifest scientific concepts and principles
3. Understand science concepts and principles
4. Communicate effectively using science language and reasoning
Pre-Assessment / Invitation to Learn
Tell the students that sometimes when using a simple tool or doing an activity, both forces of push and pull need to be used at the same time. Brainstorm with the students which simple tools use both forces. (Ex. clippers, broom, saw, shovel, rake, hammer, etc.) Brainstorm with the students which activities require push and pull. (Ex. throwing/catching a ball, dribbling, jacks, hopscotch, jungle-gym, jumping, etc.) After brainstorming, ask the students why both forces are needed for the activities mentioned. Sometimes the opposite forces are needed to make a tool work properly.
When you pull the strings outward, the Zoom Ball goes flying. The pushing action of the strings, against the opening of the bottle, sets it in motion. When the Zoom Ball reaches the other end of the strings, an opposite pushing action (your friends pulling motion) stops the ball for a moment and then sends it flying in the reverse direction.
Healthy Life Styles -
Homework & Family Connections
Have the children make the Zoom Ball at home by sending home instructions. They are to tell their families what makes the Zoom Ball work.
In their journals, have the students label a page: “A force can be a push, a pull, or both.” Then, instruct the students to illustrate and label the different kinds of forces being used: