1. Topic-
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2. Content-
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| conductor,resistance,insulator |
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3. Goals: Aims/Outcomes-
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| Explore various materials to determine which tend to conduct electricity,
and which tend to resist electrical current, and classify materials
as either conductors or insulators. |
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4. Objectives-
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1.Recognize that some objects tend to conduct electricity well while
others do not.
2.Sort objects by those which tend to act as conductors and those
which tend to act as insulators.
3. Classify a set of sorted objects by materials as either conductors
or insulators.
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5. Materials and Aids-
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| For each student: Safety glasses. For each pair of students (if
possible): 1 D-cell battery in holder, three wires (approx. 10-15cm
long), 2 flashlight bulb in holder with wire clips. Collection of
items made of various materials to test (yarn, wire, metal bolts,
plastic ruler, penny, popsicle stick, etc.) |
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6. Procedures/Methods-
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A. Introduction-
| Have you even been shocked? Rub your feet on the carpet. Then touch
your chair. Did you feel a shock? Rub your feet on the carpet, then
touch the metal part of your desk? Did you feel an electric shock? |
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B. Development-
1. Discuss. First with a partner, then whole class discussion: describe
what happened. Why did you feel a shock? Why do you think you feel
an electric shock sometimes, but not all the time?
2. What kind of experiment can we design to test what kinds of things
electricity travels through well, or not so well? |
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C. Practice-
Guided discovery: open electric circuit, where various objects can
be inserted to test conductivity.
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D. Independent Practice-
| 1.Test and classify a collection of objects to determine which objects
conduct electricity and which objects resist electricity. |
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E. Accommodations (Differentiated Instruction)-
1.ESL translations of key vocabulary terms: conductor, resistor
2.ESL/LI Draw pictures of materials tested in T-chart, label with
assistance from Teacher or paraeducator.
3. Preferred seating as required
4. GRT/Enrichment: Design an experiment to answer other questions
you may have.
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F. Checking for understanding-
1.Students: Discuss,sort, classify materials (Teacher observes)
2. Record results on a T-chart.
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G. Closure-
| Review T-chart with lab group and determine which materials tend
to be conductors and which materials tend to be resistors. |
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7. Evaluation-
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Write a lab summary. Students complete self-assessment using rubric.
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8. Teacher Reflection-
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| Review T-charts and science journal lab summaries and evaluate using
five point rubric. |
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