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What do you think?Using a bulb, a buzzer, wires, a battery and a

switch, test it out!

Circuits Questions – What Do You Think?

“Because bulb B is closer to the battery, it will be

brighter than bulb A.”

“Bulb A will always be brighter than bulb

B in this circuit.”

“You can make just the buzzer work and not the

bulb in this circuit,” says Kate.“I’m not so sure.” says Max. “I think you’d have to use a

switch. But where should it be positioned in the circuit?”

Is this right or wrong? Why do you think this?Using bulbs, wires and a battery, test it out!

Is this right or wrong? Why do you think this?Using bulbs, wires and

a cell, test it out!

A B A

B

Electricity

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Look at these symbols. Can you match the words to the symbols?

Match the Circuit Symbols

Motor Wire Switch on (closed) Battery

Cell Bulb Switch off (open) Buzzer

M

Electricity

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SCIENCE ESSENTIALS: Electricity Let’s Investigate ANSWERS Pages 16–17

Make a Circuit AnswersThese four objects could be used to make a circuit that conducts electricity and lights up a bulb.

These four objects would not conduct electricity and could not light up a bulb.

This circuit is made of wires, a cell, a switch

and a bulb.

The bulb will not light because the circuit is broken

(missing wire), so the electricity cannot flow in a loop back to the battery.

Circuit 1 Circuit 2

The bulb will not light because the

switch is off (open).

No bulbs will light in this circuit because there is

no cell or battery.

Circuit 3 Circuit 4 Circuit 5

A

B

C

This is a parallel circuit. The electricity has more

than one route it can take to flow from the cell and

back again.

Only the bottom two bulbs will

light in this circuit. That’s because the electricity has an unbroken loop it can flow around back to the cell.

No bulbs will light in this circuit because the electricity cannot flow around an unbroken loop back to the cell.

In this circuit only bulbs A and B will light.

Make the Connection Answers

Matching Symbols Answers

1/B 2/E 3/A 4/G

5/F 6/C 7/D

Let’s Talk Answers1) Electrons2) Yes – because batteries make

electrical energy that powers the toy.

3) They would both make the bulb shine the same amount. A 9-volt battery is the same as six 1.5 volt cells.

4) You can think of a switch as a bridge connecting two halves of a road together. When the bridge is down, it allows cars to cross over. When the bridge is up, cars can’t cross. When a switch is on or closed (down), electricity can cross and continue around the circuit. When the switch is off or open (up), the electricity can’t reach the other side.

Circuit 6 Circuit 7 Circuit 8

In this circuit only bulbs A and C will light.

Circuit 8Break here

A

B

C

Break here