1) How long does revolution of earth takes? a) 1 week b) 1 Year c) 1 Second 2) Why does a toothbbrush have energy? a) it contains light. b) it contains sound. c) it contains mechanical energy 3) Lamp contains what energy? a) light energy. b) Heat c) Sound energy d) Mechanical energy e) nothing f) battery 4) Battery contains what energy? a) Potential b) light energy c) Chemical energy d) Sound energy e) nothing

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