Science Chapter 9 Flashcards
Reference Point
A place or object used for comparison to determine if something is in motion
Average Speed
The total distance traveled divided by the total time
Velocity
Speed in a given direction
Acceleration
The rate at which velocity changes
Speed
The distance an object can travel in one unit of time
Motion
When an object’s distance from another object is changing
Meter
The basic SI unit of length
International System of Units (SI)
The system of measurement scientists use to communicate information clearly
Slope
The steepness of a line on a graph
The prefix that means “one hundredth” is _______
centi-
A meter is a little longer than a _______
yard
The prefix kilo- means what?
“one thousandth”
KHDUDCM
Kilo, hecto, deca, unit/gram/meter, deci, centi, mili
What equation do you use to calculate the speed of an object?
Speed = distance/time
What equation do you use to calculate the average speed of an object?
Average speed = total distance/total time
slope = ?
rise/run or Y2 - Y1/X2-X1
Acceleration is what? (hint - do not give it’s definition)
Increasing speed, decreasing speed, changing direction
What is the equation you use to find acceleration?
Acceleration = final speed - initial speed/time
Relative motion
Whether or not an object is in motion depends on the reference point
Instantaneous speed
The rate at which an object is moving at a given instant in time
