The Ordered Universe
	Physical events
 		Predictable
 		Quantifiable
		Without the predictability of physical events the scientific method could not proceed.
	The Ordered Universe
		Stonehenge
 			A Giant Calendar
 			Built to Keep Track of Time
 			Began in 2800 BC, Still Accurate Today
	The Ordered Universe
		As seen by:
 			Ptolemy – 2nd century  
			Copernicus -  16th century 
 			Brahe – late 16th century 
 			Kepler – early 17th century 
 			Galileo – early 17th century
	The Ordered Universe
		Galileo
			“The Father of Experimental Science”
	The Ordered Universe
		Experimentation
			collecting data using instruments and mathematical calculations
	The Ordered Universe
		Motion
 			Speed = distance/time
 			Velocity – speed in a specific direction
 			Acceleration – rate of change in velocity
	The Ordered Universe
		Newton’s Laws of Motion
 			1st Law
 			2nd Law
 			3rd Law
	The Ordered Universe
		1st Law of Motion – 
			a moving object will continue moving in a straight line at a constant speed, and a stationary object will remain at rest, unless acted upon by an unbalanced force
	The Ordered Universe
		2nd Law of Motion – 
			the acceleration produced on a body by a force is proportional to the magnitude of the force and inversely proportional to the mass of the object
	The Ordered Universe
		3rd Law of Motion – 
			for every action there is an equal and opposite reaction
	The Ordered Universe
		Gravity = our #1 force
			“an attractive force between any 2 objects in the universe which is proportional to the masses of the objects and inversely proportional to the square of the distance between them”
	The Ordered Universe
		Weight
			force of gravity on an object in a particular place
			can change
		Mass
			amount of actual matter an object has
			stays constant
	The Ordered Universe
		Gravity	
 			“G” – universal constant, applies to any 2 masses in the universe
 			“g” – gravity on the Earth’s surface only

			Question: If we drop two objects from the same distance above the surface of the Earth, which will fall faster, the heavier object or the lighter object?