Shared Flashcard Set

Details

Acceleration/Motion/Velocity
BMS Science Study Guide 3/27/12
49
Science
6th Grade
03/27/2012

Additional Science Flashcards

 


 

Cards

Term
In everyday language, acceleration means
Definition
The process of speeding up
Term
The rate at which velocity changes
Definition
Acceleration
Term
In Science, acceleration refers to
Definition
Increasing speed, decreasing speed, or changing direction.
Term
Whenever an objects speed changes the object
Definition
accelerates
Term
The change in speed can either be
Definition
to speed up or slow down
Term
Slowing down is sometimes called
Definition
deceleration or negative acceleration
Term
Even an object moving at constant speed can be accelerating - as long as it is changing
Definition
Direction
Term
If an object is not changing direction, you can describe it's acceleration as the rate at which it's __________ changes.
Definition
Speed
Term
To determine the acceleration of an object moving in a straight line what equation do you use?
Definition

Acceleration = Final Speed - Initial Speed

                 Time

Term
If speed is measured in meters per second(m/s) and time is measured in seconds, the SI unit of acceleration is
Definition
Meters per second per second, or m/s2
Term
To analyze the motion of an acceleration object what graph do you use?
Definition

Speed-versus time graph

and

Distance-versus time graph

Term
The ________ of the speed-versus time graph is the acceleration.
Definition
Slope
Term
A ____________ on a speed-versus-time graph means that the acceleration of the object is constant, but not zero.
Definition
Slanted straight line
Term
If the line slants upward, speed was_______
Definition
Increasing
Term
If the line slopes downward, speed was _______
Definition
Decreasing
Term
An object is in _________ if it changes position relative to a reference point.
Definition
motion
Term
A ____________ is a place or object used for comparison to determine if something is in motion.
Definition
Reference point
Term
To determine motion for an object moving on or near Earth's surface, a reference point that is fixed to earth, such as _______  or a ________ is usually used.
Definition
building or a tree
Term
To describe motion completely, you need to use
Definition
units of measurements
Term
Scientist use a system of measurement called
Definition
The International System of Units
Term
In French, this systems name is
Definition
Systeme International
Term
__________ is the length of the path between two points.
Definition
Distance
Term
The SI unit for length is the ______
Definition
Meter (m)
Term
The distance from the floor to a doorknob is about ________
Definition
1 meter
Term
To measure smaller distances ___________ and ___________ are used.
Definition
centimeters and millimeters
Term
The prefix "centi" means
Definition

one hundredth

 

Term
A centimeter is one hundredth of a meter, so there are ________________ in a meter
Definition
100 centimeters
Term
To measure a larger distance than a meter, ___________ are used
Definition
kilometers
Term
The prefix "kilo" means
Definition
One Thousand
Term
There are ________meters in a kilometer
Definition
1000
Term
Changing position relative to another object
Definition
Motion
Term
The length and path between two points
Definition
distance
Term
The __________ of an object is the distance the object moves per unit of time
Definition
Speed
Term
To calculate the speed of an object
Definition

Divide the distance the object travels by the amount of time it takes to travel that distance.

 

Speed = Distance

            Time

Term
Is the speed at which an object is moving at a given instant in time.
Definition
Instantaneous Speed
Term
To calculate the average speed of an object:
Definition
Divide the total distance traveled by the total time.
Term
When you know both the speed and direction of an object's motion, you know the ________ of the object
Definition
Velocity
Term
You can show the motion of an object on a
Definition

Line graph

(plot distance versus time)

Term
Time is shown on the
Definition
x-axis  (horizontal)
Term
Distance is shown on the
Definition
Y-axis  (vertical)
Term
The steepness of a line on a graph is its ______
Definition
slope
Term
Tells you how fast one variable changes in relation to the other variale in the graph.
Definition
Slope
Term
Tells you the rate of change
Definition
slope
Term
To calculate the slope of a line:
Definition

Slope = Rise

            Run

Term
The distance an object moves per unit of time
Definition
Speed
Term
Total distance divided by total time
Definition
Average speed
Term
Speed at a given point in time
Definition
Instantaneous Speed
Term
Speed in a given direction
Definition
Velocity
Supporting users have an ad free experience!