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Electricity - morse code

Use an open circuit with a bulb to send morse code.
Science content (2016 curriculum): 
Physics: Energy forms, Conservation of Energy (1, 3, 4, 5)
Physics: Electricity, Electromagnetism (7)
Lessons activity is in: 

Give students a morse code sheet (found online), and ask them to pair up to send each other messages with morse code. Try one letter at a time to start before sending a very short message.
Discuss the skill required to send and decode morse code fast.

Grades taught: 
Gr K
Gr 1
Gr 2
Gr 3
Teaching site: 
Gordon Elementary Science Club