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Science - Light, Sound and Magnets
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Sound is made when objects __________.
vibrate
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Cobalt, nickel, iron and _______________ are all magnetic.
steel
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What is this kind of magnet called? (A horse-shoe magnet; a bar magnet; a ring magnet).
A horse-shoe magnet.
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Light travels in straight lines only. True or False?
True.
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A food processor converts electrical energy into __________ (mention 2).
Sound energy and kinetic energy.
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Sound travels fastest through: gas; liquid; solid
solid
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Is the moon a luminous object?
No
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You can hear no sound in _____________.
a vacuum / space.
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The image is showing two: a) sound creators; b) tuning forks; c) sound forks.
tuning forks
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Light energy is a form of energy. Can you mention 3 more forms of energy?
Kinetic energy, sound energy and heat energy.
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A magnet has a north pole and a south pole. What happens when we put the north pole side of a magnet close to the north pole side of another magnet?
They repel.
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For an electric torch to switch on, it needs: a bulb, a switch, wires and a __________.
battery
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Which is the biggest luminous object for all humans?
The sun
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What is a luminous object?
It's an object that emits its own light.
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Look carefully at the picture. The bulb is in the _____________________.
bulb holder
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A television converts electrical energy into ___________ (mention 3).
Light energy, heat energy and sound energy.
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Okay!
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