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Machines and Forms or energy
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Complex machines use energy that can come from ...
people, electricity or fuel
A __________ is a rigid bar with a support called a ___________.
lever / fulcrum
A __________ is an object with at least one slanting edge.
wedge
A _________ is a circular object that turns around an ___________.
wheel / axle
We use it to hold things together or lift objects.
A screw
It is a slanting surface that connects a low level with a high level.
An inclined plane.
A ________ uses a wheel and a rope to lift or lower an object.
pulley
A complex machine...
is made out of many simple machines and/or need electrical energy to work.
A simple machine ....
has few or no moving parts.
We can classify machines as _____________ or _______________.
simple or complex machines
A machine is something __________________________.
we use to make work easier.
Energy can be obtained from ____________ or ____________ sources.
renewable or non-renewable
Sound is produced when objects ___________.
vibrate
When light reaches an object, it can do one or more of the following things:
It can be reflected, it can be absorbed or it can pass through the object.
_____________ is a man-made source of ligtht.
candles, flashlights....
_______things have more energy than _______ things.
hot / cold
Moving things have _____________.
Kinetic energy
Food contains ___________.
Chemical energy
We use ____________ for a lot of things in our homes.
Electrical energy
The Sun produces lots of ____________, too.
Light energy
_____________ is in anything that's hot.
Thermal energy
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