Focus On Physical Science: California Grade 8

Chapter 1: Motion

Standard Assessment

1.
An object that travels 100 m in 20 s has what speed? 1.b
A)200 m/s
B)5 m/s
C)2000 m/s
D)50 m/s
2.
A bicycle rider travels 15 km in 1.25 hours. What is the rider's average speed? 1.c
A)22.5 km/h
B)13.75 km/h
C)12 km/h
D)10.5 km/h
3.
__________ is displacement divided by the time. 1.d
A)Position
B)Speed
C)Acceleration
D)Velocity
4.
When a car goes around a curve at 20 mph, the __________ changes. 1.d
A)average speed
B)instantaneous speed
C)velocity
D)average speed
5.
Something is in motion if it __________. 1.a
A)changes distance
B)changes state
C)changes properties
D)changes position
6.
__________ is the change in velocity divided by the time needed for the change to occur. 1.e
A)Displacement
B)Speed
C)Acceleration
D)Average velocity
7.
Displacement measures the _________ between the starting and stopping points. 1.a
A)mass and volume
B)distance and direction
C)distance and speed
D)direction and speed
8.
When something accelerates then stops accelerating, what happens to the object? 1.e
A)goes faster
B)slows
C)continues to move at a constant velocity
D)stops completely
9.
What is the term for a change in velocity? 1.e
A)average speed
B)speed
C)instantaneous speed
D)acceleration
10.
The __________ measures the speed during an entire trip. 1.b
A)instantaneous speed
B)acceleration
C)average speed
D)overall speed
11.
Movement occurs when an object moves relative to a __________. 1.a
A)stationary object
B)reference point
C)moving object
D)different object
12.
"A _____ is used to organize and summarize data in a visual way". 9.e
A)photograph
B)drawing
C)graph
D)table
13.
On an acceleration graph in which the line is level, the acceleration is __________. 1.f
A)zero
B)changing
C)positive
D)negative
14.
When a negative acceleration is graphed, the line __________. 1.f
A)goes to zero
B)slopes upward
C)remains constant
D)slopes downward
15.
An object that has the same speed but changes direction is __________. 1.e
A)slowing down
B)speeding
C)accelerating
D)displacing
16.
At the beginning of a track race, the instantaneous speed of all runners is __________. 1.b
A)the average speed
B)0 m/s
C)unable to be measured
D)different
17.
__________ is the speed of an object at any instant of time. 1.b
A)Average speed
B)Acceleration
C)Velocity
D)Instantaneous speed
18.
__________ is distance divided by time. 1.b
A)Velocity
B)Displacement
C)Speed
D)Acceleration
19.
Which of the following statements is true? 1.e
A)An object does not accelerate if it turns and maintains constant speed.
B)If a moving object slows, it is accelerating.
C)Velocity of a moving object is the distance traveled divided by the time needed to travel the distance.
D)When speed increases gradually, average speed and instantaneous speed are the same.
20.
When you graph speed, time is on the __________. 1.f
A)vertical axis
B)z-axis
C)x-axis
D)y-axis
Grade 8
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