|Physical Science||Electricity/Magnetism 4B2.00||Unifying Concepts of Science||Interactions 2.4 a|
CONTENT STANDARD: Physical Science
CONTENT TOPIC: Electricity/Magnetism
CONCEPT: Electric current may travel along one or more paths.
CONTENT OBJECTIVE: 4B2.00 To understand the parts of a complete circuit
INSTRUCTIONAL OBJECTIVES: The learner will:
TN COMPONENT OF SCIENCE: Unifying Concepts of Science
BENCHMARK Interactions among the smallest particles determine the nature of matter. Interactions among larger collections of matter determine its behavior.
BENCHMARK The same fundamental particles are present in both living and non-living matter. The interactions of these particles shape our universe.
In another type of electricity, negative charges move through matter. The negative charges move in one direction like a stream of water. This is called current electricity. The electric current must move along a path. This path must lead back to its starting point. The path can be shaped like a loop or circle. The path is called a circuit. An activity to show this is as follows:
2. Screw the bulb into the bulb holder.
3. Tape the end of one wire to the bottom of the battery. Screw the other end of the wire to the bulb holder.
4. Tape the end of the second wire to the top of the battery.
5. Touch the loose end of the wire to the screw on the bulb holder. Observe what happens. Wires, bulbs, and batteries can be connected together. When they are connected correctly, they make a pathway for electricity. We call the flow of electricity, an electric current. The pathway that electricity follows is called a circuit. Electric current moves, or flows, through a closed circuit. The bulb's light is a closed circuit.
6. Take away the loose wire, so that it no longer touches the bulb holder. What happens? Can you explain the answer? When you touch the loose wire to the bulb holder, you close the circuit and the bulb lights. But when you take away the loose wire, you break the circuit and the bulb does not light.
You close a circuit when you turn on a light. You open the circuit when you turn off a light? What do we use to turn a light off or on? (a switch) Have students install a switch in the above activity. What happens to the circuit when the switch handle is up?
Home electricity is measured with a meter. The electric company reads meters once a month. Invite a meter reader to the classroom to teach children how to read their home dials.
This is the time this file has been accessed since 07/01/97.
The University of Tennessee at Martin is not responsible for the information or views expressed here.
Fourth Grade Science Home Page