A ball rolled across a table. The ball reached the edge and fell to the ground. What argument is BEST?

the force of gravity caused the ball to fall to the ground

Jim said that when he kicks a soccer ball in the air, the force of gravity impacts the soccer ball. What supports this?

The soccer ball slows down and then falls towards the ground with speed.

Mr. J is moving classrooms. It's not upstairs. What question should he ask to determine which simple machine is BEST?

Should the teacher use a wheel and axle to move the classroom objects?

What question should Max ask to figure out if he should use the wheel and axle to move the stove from the sidewalk?

How can I easily slide the stove off a ramp into the front door?

You need to move a box with a tv in it from a truck to the house. What question should you ask to decide which ramp ?

Which of the following ramps will require less force to move the box?

Which picture shows an unbalanced force?

Picture D, because the soccer ball is moving from the girl’s kick

Students investigate how a marble can show a balanced force. Which situation will BEST demonstrate a balanced force?

Student 3 blows on a marble with a straw but the marble does not move

Jen did an experiment like the diagram. Which effect will the weights have on the motion of the car?

The more weight the faster the car will move because of gravity

James is helping his parents set up a bedroom. They can't carry the furniture upstairs. What question should they ask?

Should we create a pulley system to attach the furniture and pull it up

Two friends that are the same height and weight get on a seesaw. What will happen after one hops on after the other?

They will not move because their forces are balanced

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Science Unit 2 CFA Review

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Questions 10

Answers

1
A ball rolled across a table. The ball reached the edge and fell to the ground. What argument is BEST?
an unbalanced push causes the ball to fall to the ground
an unbalanced pull causes the ball to fall to the ground
the force of the wind causes the ball to fall to the ground
the force of gravity caused the ball to fall to the ground
2
Jim said that when he kicks a soccer ball in the air, the force of gravity impacts the soccer ball. What supports this?
The soccer ball moves at quick speed after the ball is kicked
The soccer ball goes up towards the sky when kicked.
The soccer ball slows down and then falls towards the ground with speed.
The soccer ball is caught by the goalie.
3
Mr. J is moving classrooms. It's not upstairs. What question should he ask to determine which simple machine is BEST?
Should the teacher use a lever to lift and move the classroom objects ?
Should the teacher use an inclined plane to push the classroom objects?
Should the teacher use a pulley to pull all of the classroom objects?
Should the teacher use a wheel and axle to move the classroom objects?
4
What question should Max ask to figure out if he should use the wheel and axle to move the stove from the sidewalk?
How can I easily slide the stove off a ramp into the front door?
How can I easily prop up the stove on the sidewalk?
How can I easily elevate the stove off the ground from the sidewalk?
How can I easily roll the stove from the sidewalk to the front door?
5
You need to move a box with a tv in it from a truck to the house. What question should you ask to decide which ramp ?
Which of the following ramps will require less force to move the box?
Which of the following ramps will allow you to create the most friction?
How much does the box weigh?
What is the distance from the truck to the house?
6
Which picture shows an unbalanced force?
Picture A, because the books are not as heavy as the table
Picture C, because the pictures hanging do not move on the wall
Picture D, because the soccer ball is moving from the girl’s kick
Picture B, because the cat sleeping does not change its position
7
Students investigate how a marble can show a balanced force. Which situation will BEST demonstrate a balanced force?
Student 3 blows on a marble with a straw but the marble does not move
Student 4 pushes a marble across the carpet, and the marble slowly moves
Student 2 pushes a marble along a smooth surface and the marble rolls along
Student 1 sets up a ramp with a book and rolls a marble down the book.
8
Jen did an experiment like the diagram. Which effect will the weights have on the motion of the car?
The more weight the faster the car will move because of gravity
More weight, the car will not move because gravity does effect weight
More weight added does not change the motion and the speed of the car
More weight, the slower the car will move because gravity pulls weight
9
James is helping his parents set up a bedroom. They can't carry the furniture upstairs. What question should they ask?
Should we create a wheel and axle to roll the furniture up the staircase?
Should we create an inclined ramp and push the furniture upstairs?
Should we create a pulley system to attach the furniture and pull it up
Can we use a lever to place furniture on one side & we stand on the other?
10
Two friends that are the same height and weight get on a seesaw. What will happen after one hops on after the other?
They will not move because their forces are balanced
They will move because their forces are unbalanced

Science Unit 2 CFA Review Flashcards | StudBud