+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
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
|
