**Electric circuits**

Introductory Activities:

Tape Electroscope: Use Scotch Tape to determine the charge on an object.

Circuit Board: Make a circuit board with a board, alligator clips and a battery holder.

**PS.7.4.2** Classify Electrical conductors and
insulators

Electrophorus: Separate charge with insulators, combine charges with conductors.Multimeter Electroscope : Use a multimeter to detect the sign of an electric charge.

**PS.7.4.3** Construct simple circuits from a
Circuit Diagram.

Model voltage in a circuit using "pipe cleaners"

**PS.7.8.1** Construct open and closed
Circuits, Series Circuits, Parallel Circuits

**PS.7.8.2** Describe and diagram open and closed circuits, series
and parallel circuits

**PS.7.8.3** Compare and Contrast open and closed circuits, series
and parallel circuits

Bulbs and batteries: Make parallel and series circuits with Christmas tree bulbs.

Battery dissection: Cut apart a carbon zinc battery (NOT Alkaline!)

Magnets round the rim: Model electric current using magnets.

Multi meters current: Use meters to measure the currents in circuits.

Meters voltage: Use meters to measure voltages in circuits.

Multimeter Electroscope : Use a multimeter to detect the sign of an electric charge.

Saltwater Battery: Create a battery with aluminum and copper in salt water.

Saltwater pentacell: Place 5 saltwater cells in series to light a lamp.

Hand Battery Use a multimeter to assure the current created by human hands touching aluminum and copper.

**P.8.PS.1** Ohms law V = IR, and series V = V1
+v2, I1 = I2, R = R1 +R2, parallel V1=V2, I = I1 +I2, 1/R = 1/R1
+1/R2 (mistake in the standards equation)

Bulbs and Batteries : Make series and parallel combinations of bulbs and batteries.Bulbs, batteries, meters: Measure series and parallel circuit voltages and currents with multimeters.

Glowing Pickle: Place 110V AC across a pickle to make it glow.

**P.8.PS.2** Electric Power P = VI

Meters power: Use a meter to measure voltage across and current through a device to measure its power.Aluminum air battery: Make a saltwater battery that can provide a fraction of an amp!

Electrostatic Motor: Move a large wood beam with electrostatic charge and induction.

**P.8.PS.3** Electric energy E = Pt

**P.8.PS.4** Step up and step down
transformers

**P.8.PS.5 PS.6.8.3 **Electromagnets

Ammeter : Wind your own coil, put current through it to make an electromagnet and use it as an ammeter.

**LS.2.7.6 ** Nervous system

Domino model of a nerve : Falling dominos model the propagation of nerve impulses.

**PS.6.8.4** The relationship between
electricity and magnetism

Circles of Magnetism: Use compasses to show the magnetic field around a current carrying wire.

**PS.7.7.2** alternatives to fossil fuels,
solar wind, hydro, nuclear

Solar Cell: Use meters to measure the voltage and current, so power, made by a solar cell.Solar Brightness: Measure the brightness of the sun by comparing it to a lamp.

Solar Thermal Energy: Measure the energy output of the sun by the time it takes to heat an object.

Nuclear Fission human: Make a model of nuclear fission using humans throwing foam.

Nuclear Fission magnetic model: Use a pile of magnets that releases energy when triggered.

Scientific Explorations with Paul Doherty |
7 January 2008 |