Force - The push or pull on an object with mass causes it to change its velocity., Gravity ON EARTH - The force that pulls everything that has mass towards the Earth., Electric - The presence or flow of charged particles., Magnetic - attraction or repulsion that arises between electrically charged particles because of their motion., Friction - the resistance that one surface or object encounters when moving over another., Air Resistance - Force that slows down when you are falling in the air, Planet - What Earth is, Moon - A lump of rock, Star - self-luminous gaseous spheroidal celestial body of great mass which produces energy by means of nuclear fusion reactions., Solar System - Collection of Planets, Orbit - When an object is surrounding another object at abconstant speed whilst at a constant time, Mass - A measure of amount of matter, Weight - Mass * gravity, Gravitional Field Strength - the measure of the intensity of the gravitational field that has mass as a source and attracts other masses,

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