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Unit 5 Science Fusion Grade 4 Review
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In which example is a force causing an object to accelerate?
 
a train moving at constant speed around a curve in a track
 
a soccer ball sitting on the ground
 
a rock sitting on a ledge at the top of a mountain
 
a girl riding a bicycle constant speed straight
Jen is walking her dog at a constant rate. They keep a constant rate as they turn a corner. Why has their velocity changed?
 
because their direction changed
 
because their speed changed
 
because their position changed
 
because their force changed
A car is stopped at a red light. The light turns green, and the car turns right around a corner. Which property of the car is changing?
 
acceleration
 
position only
 
speed only
 
direction only
Renee is throwing a ball high into the air and then catching it. What is the effect ofgravity on the ball?
 
It pulls the ball back to the ground.
 
It increases the mass of the ball.
 
It makes the ball’s speed slow down
 
It makes the ball’s speed remain constant
What is changing as the boy rolls?
 
position
 
speed
 
acceleration
 
velocity
Analyze the line graph. What happens tothe object between Point Y and Point Z?
 
The object’s acceleration is zero.
 
The object is speeding up.
 
The object has no velocity.
 
The object is slowing down.
A car traveling down a road approaches a red light. the driver pushes the car’s brakes and the car slows to a stop. what causes the car’s speed to change?
 
an increase in friction
 
a decrease in velocity
 
an increase in velocity
 
a decrease in friction
The speed of an object in a particular direction is its
 
velocity
 
speed
 
motion
 
gravity
A force that acts against the direction of an object’s motion and causes it to slow or stop is
 
friction
 
gravity
 
speed
 
motion
An object that is changing its position is in
 
motion
 
speed
 
velocity
 
friction
The force that acts to pull all objects down to Earth is
 
gravity
 
force
 
friction
 
speed
The location of an object in relation to another object or place describes
 
position
 
motion
 
force
 
speed
A push or a pull is a(n)
 
force
 
gravity
 
friction
 
position
A measure of an object’s change in position during a certain amount of time is
 
speed
 
velocity
 
gravity
 
friction
Any change in the speed or direction of an object’s motion is
 
acceleration
 
velocity
 
friction
 
gravity
The speed of which of the following objects is affected by gravity?
 
a ball falling after being kicked in the air
 
a kite in the sky
 
a cruise ship on the ocean
 
a soccer ball rolling to the goal
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