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Forces of Nature

Across
Tool used for measuring mass.
These are permanent magnets. This means that their magnetism is there all the time and cannot be turned on or off. They have two poles, and north and south pole.
This terms's interaction with the gravitational attraction of the Earth is what keeps the Moon in orbit around Earth.
The factors that influence gravitational force.
Keeps the Moon in orbit around the Earth due to the moon's velocity, the Earth keeps pulling the moon towards it without the moon actually getting closer to the Earth.
Down
Tool used for measuring weight.
The amount of matter in an object.
A measure of the gravitational force exerted on an object.
Leaves one end of the magnet, called the north pole, arc through space, and re-enters the magnet at the other end, the south pole.
a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.Contains a wire which strengthens and concentrates the magnetic field which can be increased with more coils or a more powerful power source, a power source, and an iron core.
SI unit of measurement for weight.
An electric current that is induced when a magnet moves through a coil of wire, because the magnetic field is changing relative to the coil of wire.
SI unit of measurement for mass.