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Chapter 9 Motion

vocabulary

TermDefinition
motion the state of an object when distance from another object is changing
reference point a place or object used for comparison to determine if something is in motion, it must be a stationary object (tree, building, signs)
international system of units units of measurements that scientist worldwide use to communicate clearly, these are also known as SI units
meter the SI unit to measure distance/length is the meter, a meter is a little longer than a yard
speed the distance an object travels per unit of time, ex: a car travels at a rate of 60 miles per hour (mph)
average speed is the total distance an object travels divided by the total amount of time it took that object to go that distance
instantaneous speed the rate at which an object is moving at a given instant in time
velocity the speed AND direction in which an object is moving, ex: a storm can travel 25 km/h eastward
slope the steepness on a line graph, a way to show a change in motion,it tells you how fast one variable changes in relation to the other variable in the graph
acceleration the rate at which velocity(speed and direction) changes, this can occur by either increasing speed, decreasing speed, or changing directions
Created by: parhamscience
 

 



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