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WorksheetsForce and Motion
Total questions: 35
Worksheet time: 20mins
Name
Class
Date
1.
A ball rolls down from the top of a grassy hill, reaches the bottom of the hill, continues to roll, and then starts to slow down and comes to a stop. What forces caused the ball's motion?
a)
Friction caused it to roll down the hill, air resistance caused the ball to slow down and stop.
b)
Magnetic force caused the ball to roll down the hill but gravity caused it to slow down and stop.
c)
The force of the hill caused the ball to roll down it but gravity caused the ball to slow down and stop.
d)
Gravity caused the ball to roll down the hill but friction caused the ball to slow down and stop.
2.
If a spring is attached to two boards with one board at each end of the spring and the two boards are pulled far apart to stretch the spring, what force will the spring exert in response?
a)
It will sag between the two boards
b)
It will pull the boards toward each other
c)
It will hold the boards steady in one piece
d)
It will spin the boards in opposite directions
3.
The picture below shows a compass. The needle in the middle of a compass is a magnet.
If the needle on a compass turns when a person changes position on the Earth, what force is acting on the compass?
If the needle on a compass turns when a person changes position on the Earth, what force is acting on the compass?
a)
Magnetic force at Earth's polls
b)
Gravitational force from Earth's center
c)
Frictional force from Earth's surface
d)
Gravitational force at Earth's polls
4.
Science students are conducting an investigation. They prepare three level surfaces. The first surface is smooth, the second surface is sandpaper, and the third surface is carpet.
Which of the following forces can the investigation test?
Which of the following forces can the investigation test?
a)
electrical
b)
friction
c)
gravitational
d)
magnetic
5.
Which two variables determine the gravitational force between two objects?
a)
their masses and weights
b)
their masses and the distance separating them
c)
their masses and magnetic strengths
d)
their densities and the distance separating them
6.
The picture shows 4 friends climbing a mountain. If all 4 friends weigh the same amount, which person feels the least pull of gravity from the Earth?
a)
Allison
b)
Benjamin
c)
Callie
d)
Dennis
7.
Which statement correctly describes the factors affecting gravitational force between two objects?
They're determined by...
They're determined by...
a)
It's determined by their diameters and their distance from the Sun
b)
Their masses and the distance between their centers
c)
Their volumes and their acceleration relative to the Sun
d)
Their masses and the distance between their outermost edges
8.
If you were orbiting Earth, you would weigh less than you do standing on Earth. Why would your weight in orbit be lower than your weight on Earth’s surface?
a)
There would be too great a distance between you and Earth for gravity to have any effect
b)
There would be a greater distance between you and Earth, and gravity is related to distance
c)
You would have more mass in orbit, and gravity is related to mass
d)
The gravities of satellites and other objects in orbit around Earth would contribute to your weight while you were in orbit
9.
Which of these has an unbalanced force?
a)
a book sitting undisturbed on a desk
b)
a child standing in a line that is not moving
c)
a ball slowing down as it rolls on the ground along a straight line
d)
a meteoroid moving at a constant speed and direction through outer space
10.
The diagram shows forces acting on a model airplane. Both its speed and height above the ground are constant.
What conditions would cause the airplane to descend toward the ground?
What conditions would cause the airplane to descend toward the ground?
a)
The lift is equal to the drag
b)
The lift is less than the weight
c)
The thrust is equal to the weight
d)
The thrust is greater than the drag
11.
Luis rubbed a balloon on his hair and held the balloon next to the wall. he observed the balloon stick to the wall. Which of the following is responsible for the balloon sticking to the wall?
a)
gravity
b)
friction
c)
electric force
d)
magnetic force
12.
Which object had the greatest average speed?
a)
A
b)
B
c)
C
d)
D
13.
Which two measurements are needed to determine the speed of an object?
a)
distance and time
b)
distance and direction
c)
position and time
d)
position and direction
14.
What is happening between points Q and R?
a)
running at a constant speed
b)
running at an increasing speed
c)
running in place at a constant speed
d)
running back toward the starting position
15.
What is happening to the car's motion?
a)
It did not travel at a constant speed for the entire trip
b)
the total time for the car trip was 50 minutes
c)
It did not slow down during the trip
d)
It returned to where it had started the trip at the end of the trip
16.
The graph shows the motion of a cart. When is the cart moving forward at a constant speed?
a)
AB
b)
DE
c)
CD
d)
BC
17.
Which of the following statements is correct?
a)
The horse accelerated, then decelerated
b)
The horse did not accelerate
c)
The horse accelerated constantly
d)
The horse's speed was not constant
18.
Jane is investigating to find out if bean plants grow taller in ordinary topsoil or special potting soil over a three week period. She sets up her investigation with 10 bean plants of equal size in each type of soil. What should Jane do each day to make sure she gets valid results?
a)
Water only the plants in special potting soil
b)
Calculate the average plant height for each soil type
c)
Move the plants in ordinary topsoil to different locations
d)
Estimate the height of each plant's stem and record the estimate
19.
Kevin wanted to find out which of his toy cars, the Corvette or the Mustang, would roll downhill faster. He made a ramp by putting several books under one end of a board so that the board was slanted. Which would be the best way for him to perform his experiment?
a)
Roll each car down the ramp separately five times and estimate which car looked faster.
b)
Roll both cars down the ramp together one time and see which one gets to the bottom first.
c)
Roll each car down the ramp separately one time, and time them with the second hand on his watch.
d)
Roll both cars down the ramp together five times and record which gets to the bottom first each time.
20.
Jonathan and Sarah have performed an experiment and are not sure their results are valid. What should they do to check their results?
a)
average their data
b)
change their lab report
c)
perform a new experiment
d)
repeat the same experiment
21.
During a recent drought, Sonya noticed some yards in her neighborhood were healthy and green, and some were mostly brown and dead. Sonya believes the difference has to do with how often her neighbors mow their grass. What should Sonya do first to find out if she is right?
a)
Ask her neighbors to cut their grass on the same schedule
b)
Study other neighborhoods to see if there are similar problems
c)
Compare the neighbors' lawn mowers to see if there are similarities
d)
Survey her neighbors about their mowing schedule and record the details
22.
For her science fair project, Marcy is investigating how levels of carbon dioxide affect plant growth. Which of the following is most important for Marcy to do?
a)
She needs to make sure her results match her predictions
b)
She needs to make sure that her results contain both words and numbers
c)
She needs to make sure that the explanation of her results is based on evidence
d)
She needs to make sure her results get published so that everyone can read them
23.
Which of the following must be true for scientific results to be valid?
a)
The results should be drawn in a graph
b)
The results should be based on evidence
c)
The results should support the ideas of other scientists
d)
The results should match the predictions of the scientist
24.
Dr. Jones thinks she has just discovered a new plant species. How should she best communicate her findings with other scientists?
a)
Try to find another plant to discover
b)
Post her discovery on the internet as fact
c)
Publish her discovery for other scientists to test
d)
Call her friends and tell them about the discovery
25.
Many people take vitamin C when they feel they are catching a cold. In fact, some people seem to recover more quickly when they take C vitamins. What is the main problem with concluding vitamin C helps you fight off a cold based on this information?
a)
We cannot know exactly how vitamin C works
b)
We cannot keep track of how much vitamin C people take
c)
We cannot know how long the cold would have lasted without the vitamin C
d)
We cannot know what other changes in diet people may have made while sick
26.
What is another word for hypothesis?
a)
evidence
b)
graph
c)
investigation
d)
prediction
27.
The variable in the experiment that is the outcome that you measure is called:
a)
Control
b)
Dependent
c)
Independent
d)
Hypothesis
28.
The variable that is changed on purpose is:
a)
Control
b)
Dependent
c)
Independent
d)
Outcome
29.
What is an inference?
a)
Just a guess.
b)
A statement based off of your observations.
c)
The same as an observation.
d)
Examples of something.
30.
When experimenting with the growth of a plant, a scientist uses three plants, two different fertilizers, equal light, and equal water. What type of variable is the water?
a)
Dependent
b)
Independent
c)
Control
d)
Outcome
31.
In a paper airplane experiment, changing the size of the airplane would be which variable?
a)
Dependent
b)
Independent
c)
Control
d)
Conclusion
32.
Squidward found new reeds to tryout for his clarinet. He used an APPLAUSOMETER to measure clapping/applause after playing Under the Sea with each reed. The results were put in the table.
What was the dependent variable?
What was the dependent variable?
a)
The Song
b)
The Reed
c)
The Applause
d)
The clarinet
33.
The x axis is always the...
a)
independent variable
b)
dependent variable
c)
control variable
d)
all of these
34.
The y axis is usually the...
a)
independent variable
b)
dependent variable
c)
control variable
d)
all of these
35.
The independent variable in this chart/graph is...
a)
hours
b)
number of bacteria
c)
none of these
d)
both of these
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