Unit 1 Chapter 1 Review

What forces are causing the swing to move in Figure 1?

• A swing moves up when the force of gravity pushed the person up and the force of gravity pulls the swing down.

• A swing moves down no force is applied.

• A swing moves up when a person pushes up with their legs and pulls down with their legs.

• The swing moves up when the forces are the same.

Tags

NGSS.3-PS2-1

NGSS.5-PS2-1

At the beginning of the unit on forces, Mrs. Terry asked her students what they knew about forces. Energy has the ability to cause motion or create change.  Every day, we observe objects in our environment that are in motion. Students made the following claims about forces and motion.

• An object moving in one direction can never begin moving in another direction.

• 1. Some forces, such as pushes and pulls, can cause objects to move.

• 1. An object in motion will always move in one direction and cannot change directions.

• 1. An object that remains in its same position is in motion. 

 Four friends were playing kickball. They each had different ideas about the ball and motion. These are each of their claims: 

       Lily: The ball has to be on the ground, not moving, to have motion. 

       Mike: The ball has to be moving to have motion. It doesn’t matter how fast it is moving. 

       Otto: The ball has to be moving very fast to have motion. 

       Ava: The ball is in motion when it is both moving and not moving.

Whose claim is correct in describing motion?

• Lily is correct because the ball has to be not moving to have motion.

• Mike is correct because the ball has to be moving to have motion and it doesn't matter how fast it is moving.

• Otto is correct because the ball has to be moving very fast to have motion.

• Ava is correct because the ball is in motion when it is both moving and not moving.

Think about the chain reaction with the dominoes.  How do we know that there were forces acting on this domino chain reaction? 

• The dominos did not move

• The finger used the force of gravity to make the domino move.

• The finger used a pushing force to make the domino to move.

• The finger used a pulling force to make the domino move.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Read the sentences below then choose the best title.

1. It answers a question about how or why something happens. 

2. It is based on the ideas you have learned from investigations and text. 

3. It uses scientific language. 

4. It is written for an audience. 

5. It describes things that are not easy to observe.

• Balancing Forces

• Scientific Explanation

• chain Reaction

• Non-touching Force

Tags

NGSS.MS-LS2-4

NGSS.MS-PS2-4

 What must be applied to push or pull an object?

• Gravity

• Speed

• Force

• Distance

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

 A student makes two claims while observing this flag outside. Which two claims are true?

• The wind is not blowing or moving the flag.

• The wind is blowing hard making the flag move.

• There is no force from the wind applied to the flag.

• Since the flag moved, a force must have been applied.

• The wind is pulling the flag in opposite directions.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

Which statement best describes the force on this object?

• The person is pulling the object in the opposite dirrection.

• The person is pushing the object to a new location.

• The person is not applying a force to the object.

• Gravity is the only force acting on this object.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A baseball is lying on the floor. Which statement best explain when the baseball will move?

• The ball will never move.

• The ball will move when gravity pulls on it.

• The ball will move when the lights are turned on.

• The ball will move when a force acts on it.

Tags

NGSS.MS-PS2-2

 In Chapter 1, we learned about a floating train in the city of Faraday. What is causing the train to rise?

• The train rises because a force from another object acts on it. I know this because the train moves.

• The train rises because of gravity. I know this because gravity if a forces that pushes up.

• The train rises because of a pulling force. I know this because the train is being pulled up.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4