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chapter 12 Matter of Motion review
供稿人: Ms. Roldan
average speed
constant velocity

Section: Measuring Motion
Which of the following is occuring all around us, even if we don't see anything moving?
constant acceleration
motion

Section: Motion and Reference Points
an object that stays at the same acceleration
an object that stays at the same velocity
an object that appears to stay in place
an object that appears to keep moving
What is a reference point?

Section: Motion and Reference Points
What is an object's change in position over time relative to a reference point called?
speed
acceleration
friction 
motion

Section: Standard Reference Points
A nonmoving object on Earth's surface can be used as which of the following for seeing motion?
a standard reference point
a standard starting point
a standard finishing point
a standard midpoint

Section: Motion in a two-dimensional System
On the grid in the figure in your book on page 337 that illustrates motion in a two-dimensional system, where is the starting reference point?
one position to the right on the x-axis
where the x-axis meets the y-axis
one position to the left on the x-axis
one position up on the y-axis

Section: Motion in a two-dimensional System
How would the motion of an object moving to the right be describedin reference to t two-dimensional grid?
in a positive direction on the y-axis
in a negative direction on the y-axis
in a negative direction on the x-axis
in a positive direction on the x-axis

The rate at which an object moves is its_______________.
the total distance traveled divided by the total timetaken to travel is called________________.
One way to express speed is the SI unit of __________
per second

Section: Average Speed
Place the terms in the correct sentence
Average speed
?
speed
?
meters
?

Section: Making a graph showing speed
Distance units are plotted on the y-axis of a graph showing speed.Which of the following is plotted on the x-axis?
meters
speed
motion
time

Section: recognizing speed ona graph
Why might the distance traveled in a given second vary on a graph showing speed?
because the speed is constant
because the speed is not constant
because there is no motion
because motion is constant

Section: VELOCITY Direction Matters
What is the speed of an object in a particular direction called?
distance
speed
velocity
acceleration

Section: Speed Versus Velocity
Which of the following could describe an airplane's velocity?
600km/h
600 mi/h
600 mi/h south
600 south

Section: Speed Versus Velocity
What is the difference between speed and velocity?
Speed must include a direction
Velocity must include a direction
Speed and velocity are the same
Velocity never includes a direction
A decrease in speed is sometimes called ____________________ acceleration.
The rate at which velocity changes over time is called____________________.
An increase in speed is sometimes called ________________ acceleration.
Negative acceleration is also called  ____________________________.

Section: Acceleration
Use the terms from the following list to complete the sentences below:
positive
?
deceleration
?
negative
?
acceleration
?

Section: Circular Motion: Continuous Acceleration
What is the acceleration that occurs when an object moves at a constant speed in a circular motion called?
velocity
positive acceleration
negative acceleration
centripetal acceleration

Section: recognizing  Acceleration on a Graph
What does positive acceleration look like on a graph of speed versus time?
velocity
positive acceleration
negative acceleration
centripetal acceleration
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