1. Chapter 4
Lesson 2: Circuits
4th Grade Science p22-27

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

3. Electrical Symbols
Battery Bulb Resistor Switch

4. Vocabulary Series circuit Parallel circuit
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

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

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

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

8. How is Lighting Produced?
Zeus!

9. No Really, How?
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