Read Fourth Grade Plan for Current and Electricity Unit text version

CURRENT ELECTRICITY CYCLE I Constructing Physics Understanding 2003 Janet Helmandollar Marsha Lockard Megan McQuerry 4th Grade Science

Fourth Grade Plan for Current and Electricity Unit

Desired Outcomes (Missouri Standards): · III B 3 ­ Electricity-series/parallel circuits · III B 5 (5-8) ­ Chemical energy is stored in bonds between atoms in elements and compounds · III C 5 ­ Materials have different electrical resistance which converts electric energy into heat energy

Student Objectives: · Define electrical conductors and non-conductors · Identify metal (generally as conductors and non-metals (generally) as non-conductors · Explain that a bulb will light when the bulb filament is part of a continuous loop of conductors from one end of the battery to the other (with no short circuit) · Analyze battery-bulb connections to predict whether or not the bulb will light · Explain, using examples, how non-conductors allow us to control the flow of electricity · Distinguish between observations and inferences · Write operational definitions for key concepts in current electricity

BACKGROUND Target Ideas for Cycle I

See Constructing Physics Understanding Software: Project Director, Fred Goldberg

BRIEF OVERVIEW of Cycles and List of Activities See Constructing Physics Understanding Software: Project Director, Fred Goldberg

Materials Needed

Per Group: One flashlight bulb One D cell battery (have students supply) Two copper wires (stripped ends) Various test materials (chalk, paper clip, aluminum foil, rubber band, paper, Copper strip, tongue depressor, steel washer, etc.) 15 index cards (4 X 6)

Day One

Current and Electricity (CE) Unit - Activity 1-E1

How Can a Bulb, Battery and Wires be Connected to Light the Bulb? Time for class ­ One class time of 40-45 minutes

See Constructing Physics Understanding Software: Project Director, Fred Goldberg Student Objective: Student will distinguish between observations and inferences No computer is used in this activity ­ · Paired Students ­ Students will predict which of the bulbs light on the worksheet and share their predictions with the class. · · Students test predictions using bulb battery and wire to find if their predictions are correct. Students will test and share with the class their results. Wrap-up discussion distinguishing between observations and inferences.

Day Two CE Activity 1-E2 -

How Can a Single Wire be Used to Light a Bulb with a Battery? Time for class ­ One class time of 40-45 minutes

See Constructing Physics Understanding Software: Project Director, Fred Goldberg Student objective: Explain that a bulb will light when the bulb filament is part of a continuous loop of conductors from one end of the battery to the other (with no short circuit).

No computer ­ Paired Students ­ Students will predict and test predictions Materials: (one of each per group) one bare copper wire, one battery, one bulb Discuss correct vocabulary terms ­ conductors and non-conductors, filament Constucted Response: Using the vocabulary terms, explain why the bulb lit. Compare the arrangement of the bulbs that lit to those that did not light.

Day Three

Read Textbook pages E-96-E-99 (Harcourt Science, Grade 4, 2000)

Electric Current ­ moving charges, controlling current, series and parallel circuits ­ One class time of 40-45 minutes

Student Objective: Write operational definitions for key concepts in current electricity. Materials: Textbooks, paper and pencil Discuss text information. Assign questions on E-99.

Days Four and Five CE Activity 1- D 1 How Does a Bulb Work? ­ Two class

times of 40-45 minutes

See Constructing Physics Understanding Software: Project Director, Fred Goldberg Student Objectives: Identify metals (generally) as conductors and non-metals (generally) as non-conductors. Explain using examples, how non-conductors allow us to control the flow of electricity.

Share summary of what we have done so far.

Day Six - What does the current look like? One classroom time of 40-45

minutes

Student Objective: Write operational definitions for key concepts in current electricity Materials: Index Cards Activity: Students work in groups to create different circuits. Draw ahead on index cards: 10 showing wire, one switch, two bulbs, two batteries. Students get into groups to lay cards down to make complete circuits.

CE Activity I - D2 - How Can a Bulb be Lit With Two Wires? One Day Seven classroom time of 40-45 minutes See Constructing Physics Understanding Software: Project Director, Fred Goldberg Student Objective: Analyze battery-bulb connections to predict whether or not the bulb will light.

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Fourth Grade Plan for Current and Electricity Unit

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