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Electric Circuits

Vancouver School District
Science and Technology for Children
STC Unit - Electric Circuits
Grade 4 - Earth / Space Science

The modern world would not be possible without electricity. Electricity lights our homes and industries; powers many forms of transportation; supplies complex lines of communication through telephones, televisions, radios, and computers; and provides us with a dizzying array of labor-saving devices, both in the home and at the workplace. What's more, knowledge of electricity has given scientists new ways to pursue other disciplines--chemistry, physics, biology, and medicine.

Children, too, are fascinated with electricity. They wonder how it powers so many different kinds of devices. This unit, Electric Circuits, will help them begin to answer their many questions by opening the door to the world of electricity. The unit makes use of electrical "stuff," such as wires, bulbs, and batteries, and includes investigations that are both useful and fun.

In Electric Circuits, students are first introduced to the basic properties of electricity as they learn about electric circuits and the parts of a light bulb. Next, students learn about
conductors and insulators and about the symbols used to represent the parts of a circuit in circuit diagrams. Students also explore different kinds of circuits, learn about switches, construct a flashlight, and investigate the properties of diodes. Finally, students apply their knowledge and skills to wire a cardboard house.

By observing various properties of electricity, you'll help students begin to understand the diversity of its uses and develop the appropriate appreciation of it in the environment around them. With the activities in Electric Circuits, you'll encourage your students to observe and detail

· Explain, predict, describe, and record results of experimentation on a variety of
electrical circuits.
· Differences between electrical circuits (series and parallel).
· Individual differences within materials (conductivity and insulator) properties.

This is a very exciting unit for young students because they have a chance to observe, touch, test, analyze, build models and see science in action as they

· Interpreting test results, wire simple circuits, and to draw conclusions about
electrical circuits.
· Construct models to test the effects of electrical interactions.
· Compare observations of the varieties of conductors and insulators in terms of
unique properties that are observed.

You do not have to be an expert in electricity to teach this unit. The background sections of the Teacher's Guide will provide you with most of the information you need. But don't be surprised if you find yourself learning along with the students, and if you and your students find yourselves faced with puzzling questions. Use this situation to model the way scientists learn: define the question, then ask, "How can we find out?" This will encourage your students to find out on their own by experimenting and consulting
resource materials. This is a rich unit for students. They learn to use models to study the interactions of electricity and to test these interactions under various conditions. They are challenged to make comparisons on the basis of their own results and those of their classmates. They relate their models to the real world as they apply learned concepts to the simple circuits they build. Through these applications, students will be encouraged to observe electricity each day and to search for evidence of the interactions in the world around them.

Essential Lessons: 2, 3, 4, 5, 6, 7, 10, 12, 13, 14

In doing each of the essential lessons, all content and performance standards will be met for the Washington State EALR's and Benchmarks. The lessons can be done in clusters or combined grouping. To ease Kit usage the following lessons should be done in the above sequence. The instructional approach to enhance student inquiry and discovery is to combine the lessons in clusters (2-4), (5-7), 10, (12-14), and then culminate the unit with final project assessment. The grayed lessons should be done if time is available. This will assure that you will be able to accommodate all EALR and WASL requirements. If time is not available the grayed lessons could be eliminated, but this means that you will need to assure that the remaining lessons are done in breadth and depth.

The Appendices include many suggestions for post-unit assessments. They also provide information about preparing materials and constructing hidden circuit boxes. The Bibliography has suggestions of books that will help students see how discoveries in electricity fit into the history of the United States, as well as books that will help students delve further into the scientific and technological aspects of electricity.



 

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