Home Page

Science 3

L.C: To predict and test whether a lamp or bulb will light within the circuit. 

Look at the pictures of circuits below. 

Make predictions on which circuits will light the bulb and which will not.

Explain your reasons. 


Again, use the language of explanation to write your predictions. 

If you are working at home click on the pdf below, take a screen shot then write your predictions. 

In class, we will complete this task on SeeSaw.


Electricity can flow through the components in a complete electrical circuit.

A circuit always needs a power source, such as a battery, with wires connected to both the positive (+) and negative (-) ends. A battery is made from a collection of cells connected together.

A circuit can also contain other electrical components, such as bulbs, buzzers or motors, which allow electricity to pass through.

Electricity will only travel around a circuit that is complete. That means it has no gaps. You can use a switch in a circuit to create a gap in a circuit. This can be used to switch it on and off.

When a switch is open (off), there is a gap in the circuit. Electricity cannot travel around the circuit. When a switch is closed (on), it makes the circuit complete. Electricity can travel around the circuit.

Here are the electrical symbols to help you.

cell is a single unit device which converts chemical energy into electric energy. A battery usually consists of group of cells.


The Voltmeter is a measuring instrument used to find the voltage levels around an electrical circuit when connected in parallel with the part of the circuit being measured.


An ammeter measures the current, to measure the current flowing through a component in a circuit, you must connect the ammeter in series with it.

We will just be looking at and using  bulbs/lights, batteries, cells,  buzzers, wires and switches.

Once you have made your predictions, we will make the circuits to test whether the circuits will light the bulbs or make the buzzer buzz.


Were your predictions correct?