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13 terms

Motion

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motion
the state in which one object's distance from another is changing
reference point
a place or object used for comparison to determine if an object is in motion
International System of Units
a system of measurement based on muliples of ten and on established measures of mass, length, and time
meter
the basic SI unit of length
speed
the distance an object travels per unit of time
average speed
the overall rate of speed at which an object moves; calculated by dividing the total distance an object travels by the total time
instantaneous speed
the speed of an object at one instant of time
velocity
speed in a given direction
slope
the steepness of a line on a graph, equal to its vertical change divided by its horizontal change
plate
one of the major pieces that make up Earth's upper layer
theory of plate tectonics
the theory that pieces of Earth's outer layer are in constant motion
acceleration
the rate at which velocity changes
"Mary has chosen the good portion, which shall not be taken away from her."
Luke 10:42