1) Does sound travel faster through a solid, liquid or gas? a) solid b) liquid c) gas 2) Name the type of energy that is transferred by longitudinal waves. a) Kinetic b) light c) sound 3) Why can X-Rays be dangerous a) Ionizing radiation can harm people by causing mutations b) X-Rays have a low frequency c) X-Rays penetrate through our body and damage cells 4) Which component provides energy to the circuit? a) Bulb b) Battery c) Wire 5) What is the formula to calculate resistance? a) Potential difference/ current b) Current x Potential difference c) Current - Voltage 6) Why is copper used for wires in a circuit? a) Copper is a good insualtor b) Copper is a good conductor of electricity c) Copper is unreactive

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