gravity - an attractive force felt between all objects, force - a push or pull that can cause an object to change its motion, mass - the amount of matter an object contains, Isaac Newton - British scientist who first came up with the mathematical ideas supporting gravity, weight - the measure of the force of gravity on an object, distance - how far apart two objects are, evidence - a sign which shows that something exists or is true, accelerate - a change in the speed or direction of motion of an object, rest - a state of no motion relative to the surroundings, parallel - side by side and always having the same distance between, lunar eclipse - when the moon passes directly behind the Earth and into the planet's shadow,

Gravity

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