https://padlet.com/vgrape/rj46128088ci motion en-us 2017-09-26 14:05:16 UTC 2017-10-02 14:08:13 UTC hello@padlet.com vgrape https://padlet.com/vgrape/rj46128088ci/wish/191258297 ~Don't always have to see something move to know motion has taken place
~reference point is needed to determine the position of an object
~a frame of reference is a coordinate system in which the position of the objects is measured 
~am important part of describing the motion of an object is to describe how far it has moved which is DISTANCE 
~Displacement is the distance and direction of an object changed in position from the starting point ]]> 2017-09-26 14:07:25 UTC https://padlet.com/vgrape/rj46128088ci/wish/191258297 vgrape https://padlet.com/vgrape/rj46128088ci/wish/191258495 ~speed is the distance an object travels per unit of time
~any change over time is called a RATE
~if you're traveling at a constant speed you can measure your speed over any distance interval 
~Usually speed is not constant
~Average speed is the total distance divided by the total time of travel
~Instantaneous speed is the speed at a given point of time 
~Whn something is speeding up or slowing down its instantaneous speed is changing ]]> 2017-09-26 14:07:41 UTC https://padlet.com/vgrape/rj46128088ci/wish/191258495 vgrape https://padlet.com/vgrape/rj46128088ci/wish/191258656 ~the motion of an object over a period of time can be shown on a distance time graph 
~time is plotted along the horizontal axis of the graph
~distance traveled is plotted along the vertical axis
~The line representing the objects motion is a straight line 
~if the object moves with constant speed the increase in distance over equal time intervals is the same
~the steepness of a line on a graph is the slope of the line 
~on a distance time graph the distance is plotted on the vertical axis and the time on the horizontal axis ]]> 2017-09-26 14:07:58 UTC https://padlet.com/vgrape/rj46128088ci/wish/191258656 vgrape https://padlet.com/vgrape/rj46128088ci/wish/191259084 ~speed describes only how fast something is moving
~velocity includes the speed of an object in the direction of its motion
~the velocity of an object can change even if the speed of the object remains constant]]> 2017-09-26 14:08:41 UTC https://padlet.com/vgrape/rj46128088ci/wish/191259084 vgrape https://padlet.com/vgrape/rj46128088ci/wish/191259203 ~mountains plains lake and oceans seem to remain unchanged over hundreds of years
~larges have occurred in the past 250 years
~changes in the landscape occur constantly as continents drift slowly over surface
~earth is made in layers
~the outer layer is the crust
~below the outer layer is the upper mantle
~the crust and the upper mantle are called the lithosphere
~the lithosphere is broken into huge sections called plates
~moving plates cause geological changes 
~movement of plates change the shape of oceans and the shapes of continents 
~moving plates also change the formation of mountain ranges earthquakes and volcanic eruptions
~plates move so slowly that their speeds are given in units of centimeters per year 

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