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CCNN 5º - Electricity, Sound and Light
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What does opaque mean?
Opaque means that light does not go through the materials and you cannot see through them at all.
What does translucent mean?
Translucent means that light goes through the materials but we can't see clearly through them.
What does transparent mean?
Transparent means that light goes through it and we can see through it clearly.
Give an example of a natural source of light.
Sunlight
Give an example of a man-made source of light.
Torches, lightbulbs...
What type of energy allows us to see?
Light energy
True or false, sound travels through solids.
True
What do sound waves travel fastest through?
Sound travels fastest through solids.
What type of energy is created when objects vibrate to produce waves?
Sound energy
What four characteristics does sound have?
Duration, intensity, pitch, timbre
What device turns electric power into another type of energy?
A resistor
What does a power switch do?
A power switch opens or closes the flow of electricity.
Give an example of a conductive material
Metals
What are insulating materials?
Materials that do not allow electricity to move through them.
What are conductive materials?
Materials that allow electrical currents to flow through them.
What is an example of a generator?
A battery
Why is electricity dangerous?
Electricity can easily move through water and our bodies are made up of mostly water.
Where is electricity created or generated?
Power Plants
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