Unit 1 Chapter 5

Using information from Figure 1 to answer the following question.  

Choose two statements that best describe the motion of the skateboard.

•  The skateboard moves faster on the way down the left side than on the way up the right side.

• The skateboard moves slower on the way down than on the way up.

• The skateboard moved back and forth on the ramp.

• The skateboard did not move on the ramp.

• The skateboard moves at the same speed at all times on the ramp.

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Patterns of motion can be observed on the playground.  What is an example of a pattern of motion? 

• There is a pattern of motion on a slide

• There is a pattern of motion swinging on a swing.

• There is a pattern of motion on the balance beam.

• There are no patterns of motion on the playground

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  Patterns of motion can be observed with a swing. What is the pattern of motion when swinging on a swing?

• The pattern of motion on a slide is moving down.

• The pattern of motion on a swing is back and forth.

• The pattern of motion on the balance beam is forward.

• There are no repeated actions on the playground.

Use Figure 1 and your knowledge of science to answer the question. Three kids are swinging on the playground. Two kids are moving. The last kid on the right is not moving.

Which statement is true about the two students who are moving?

• The forces on the moving swings are balanced.

• The forces on the moving swings are unbalanced.

• There are no forces acting on the moving swings.

• All three kids are using the same amount of force.

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Using figure 1, which two forces are acting on the students who are swinging? Choose 2

• Magnetic

• pushing force

• gravity

• balanced force

• no forces are acting while swinging

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Elena wants to investigate how patterns can be used to predict how an object will move.  She attaches a string to a ball and pulls it back.  Look at the picture below that shows this.

What can the student predict that the ball will do after it swings to the left side?

• The ball will stay on the left side.

• The ball will move higher each time it swings to either side.

• The ball will swing to the right side and then back to the left.

• The ball will stop in the middle before it reaches the right side.

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NGSS.MS-PS2-4

Scientists often look in caves for clues about Earth’s history.  Sometimes the opening to a cave is easy to get through.  Other times it is not, because it could be blocked.

The image to the right shows a cave blocked by a boulder (big rock).  The boulder is firmly planted into the ground, and there is grass growing around it.

Which of the following statements about the forces acting on the boulder is TRUE?

• The forces are balanced because the boulder is not moving.

• The forces are unbalanced because the boulder is heavy.

• There are no forces acting on the boulder because it is hard,

• The forces are caused by a magnet because the boulder is metal.

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 In the video, we watched how the train floated as it traveled then it fell back down to let off passengers when it stopped. Which statement best explains how the floating train falls back down? 

•  The train runs on an electromagnet which can be turned off. This would take away the repelling magnetic force, so there is no force to balance the force of gravity on the train.

• The train runs on gravity which can be turned on. This would take away the attracting magnetic force, so there is a balanced force on the train.

• The train runs on gas which can run out. This would take away the pushing force, so there is no force to make the train move.

• Magnetic force and gravity are balanced when the train falls back down.

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How are ring magnets and electromagnets different?

• Ring magnets can be turned off and electromagnets can not be turned off.

• Ring magnets are magnetic and electromagnets are not magnetic.

• Ring magnets can not be turned off and electromagnets can be turned off.

• Both ring magnets and electromagnets can be turned on and off.

 A student makes the claim that “Electromagnets can be turned on and off”. Do you agree with this claim?

• yes, because electromagnets run on electricity and they can be turned off with a switch.

• no, because electromagnets are magnets and they do not have a switch to turn on and off.

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