Activity 1 - Electric Charge (Q)

It an atom (or object) gains or loses electrons it becomes electrically charged.  

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Electric Current (I)

The rate that charge (Q) flows in a circuit.   Current is measured in amps (A). See this link to learn all about electric current

Potential Difference (∆V)

Potential difference is a measure of the energy (J) gained or lost per Colomb of charge (Q) when passing through a component in an electric circuit.  Click on this link to learn more about potential difference

Resistance

Resistance is a measure of the opposition to current in a circuit.  A component with a high resistance will resist current more and extract more energy (there will be a larger potential difference across the component) than a device with lower resistance.

Factors affecting resistance of a metal wire

Here is a great review that consolidates most of what we have learned so far.  Click on the arrow at bottom right of screent

Activity 3 - Circuit Construction Kit

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The Water - Electric Circuit Analogy