Chapter 1 Physics Test

21 cards   |   Total Attempts: 182
  

Cards In This Set

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Motion
When an object's distance from another object is changing
Reference point
A place or object used for comparision to determine if something is moving
What is a good reference points?
Stationary objects
SI
(the international system of units) the system used by scientists all ove the world to measure, the metric system
Speed
Distance/time
Average speed
Total distance/ total time
Instantaneous speed
The rate at which an object is moving at a given instant in time
Velocity
The speed in a given direction
When do you know an object's velocity?
When you know the object's speed & direction
What type of graph can be used to show an object's motion?
Distance-vs-time graph
Plates
Major peices of earth's rocky outer layer
The theory of plate tectonics
A theory that states that earth's plates move slowly in various directions
Why do earth's plates move?
The heat causes materials to slowly rise up which causes a current that moves the earth's plates
How do plates move (directions)
Push & pull towards & away from each other & slide past each other
Acceleration
That rate at which velocity changes or the process of speeding up