Chapter 4 Lesson 2 Circuits 4 th Grade

Chapter 4 Lesson 2: Circuits 4 th Grade Science p 22 -27

Vocabulary l Circuit – l A path charged particles can flow to produce electricity. Current – A flow of charged particles, such as electrons, moving through a circuit.

Electrical Symbols Battery Bulb Resistor Switch

Vocabulary l Series circuit – l A circuit in which there is only one path for the electrons to take Parallel circuit – A circuit with more than one path for electricity

Vocabulary l Open circuit – l A current containing a gap Closed circuit – A circuit that has no gap in the path for the current.

Vocabulary l Conductor – l A material through which electricity flows easily. Insulator – A material through which heat or electricity does not flow easily.

Object Conductive Insulator Shiny Nail Dull Nail Straw Sponge Activity Black Rock Pebble l Metal Screen Brass Fastener Paper Clip Copper Question – What objects conduct electricity? l Hypothesis – Supplies – l Conclusion – l Screw Yarn Cardboard Wood Stick Washer Aluminum Foil

How is Lighting Produced? Zeus!

No Really, How? l l l Lighting is just like the spark from your finger to a door knob… …only MUCH bigger! Produced by static electricity – – Negative charge in the clouds Positive charge on the ground p. 280