Through hands-on experiments and class discussions, students will create definitions for a complete circuit and an incomplete circuit.
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Wire can be substituted with sections of wire cut from holiday lights or strips of aluminum foil. Sections of holiday lights that include bulbs can be used instead of flashlight size bulbs. A switch can be made from a small square of cardboard, two paper fasteners (brads), and a small paper clip. Make a small hole in the cardboard, slip the paper clip over the end of the brad, and fasten the brad to the cardboard. Insert the other brad close enough to the first brad that the paper clip can touch it. To use as a switch, attach one wire to each of the brads. The swinging paper clip will open and close the circuit.
Ideally, students should work in pairs, but if supplies are limited, make the groups as small as possible.
"Light and Sound Globes " or "Happy Balls " are small balls with 2 contacts on the bottom. When we hold the ball, our skin conducts enough electricity to complete the circuit. Music plays and/or the ball lights up. These can be purchased through many of the large science supply companies.
1-Use science process and thinking skills.
Invitation to Learn:
Use "Light and Sound Globe " or "Happy Ball." Ask questions like: "What makes the globe light? Why can 't I use two pencils to push the contacts and make it light?" Or tell students they will get to make an improvised flashlight.
Write five fact sentences and five opinion sentences about your circuit.
Create a Venn Diagram comparing complete and incomplete circuits.
What is a switch 's job?
Ask students to create a complete circuit and an incomplete circuit. Describe the difference between a complete and an incomplete circuit. Create a Venn Diagram.
This lesson is part of the Fifth Grade Science Teacher Resource Book (TRB3) http://www.usoe.org/curr/science/core/5th/TRB5/. The TRB3 is designed to be your textbook in teaching science curriculum to your students. This book covers all the objectives of each standard and benchmark. If taught efficiently, a student should do well on the End-of-Level (CRT) tests. The TRB3 is designed for teachers who know very little about science, as well as for teachers who have a broad understanding of science.