
Unit 3: Force & Motion
Authored by Mark Palmer
Science
8th Grade
NGSS covered
Used 4+ times

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39 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the SI unit for speed?
m
s
m/s
s/m
Answer explanation
Feedback: Speed is typically measured in meters per second, or m/s.
Tags
NGSS.MS-PS3-1
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What are the axes on a distance-time graph?
the x-axis is time and the y-axis is distance
the x-axis is distance and the y-axis is time
the x-axis is time and the y-axis is speed
the x-axis is speed and the y-axis is time
Answer explanation
Feedback: On a distance-time graph, the x-axis is time and the y-axis is distance.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If a train goes at a constant speed of 40 miles per hour for one hour, then at a constant speed of 50 miles per hour for two hours, what is its instantaneous speed at the beginning of the last hour of its trip?
40 mph
45 mph
47 mph
50 mph
Answer explanation
Feedback: The instantaneous speed of the train at the beginning of the last hour is 50 mph.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What does a straight, sloped line on a distance-time graph represent?
changing speed
constant speed
instantaneous speed
zero
Answer explanation
Feedback: A straight, sloped line on a distance-time graph represents constant, unchanging speed.
Tags
NGSS.MS-PS3-1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which best describes the velocity of a person on a merry-go-round?
constant
increasing
zero
continuously changing
Answer explanation
Feedback: The velocity of an object moving in a circle is continuously changing.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The graph gives the distance each girl swam with time. Who swam at a constant speed for the entire race?
only Julie
Julie and Mary
Mary and Kathy
only Kathy
Answer explanation
Feedback: Straight line graphs of distance over time that do not change direction show constant speed. Mary and Kathy were swimming at a constant speed for the entire race.
Tags
NGSS.MS-PS3-1
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What was Julie’s average speed (in meters/second) after 20 minutes?
0.33 m/s
3 m/s
20 m/s
48 m/s
Tags
NGSS.MS-PS3-1
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