Science DA Review Pt. 2 (Force, Simple Machines, & Water Cycle))

 David and his friend Delia arrive at the playground. David and his friend are so much alike. They are the same age, the same height, and they even weigh the same. They can't wait to play on the new seesaw at the playground. David hops onto one side and Delia hops onto the other.

What will most likely happen to David and Delia on the seesaw?

• David and Delia will not move because their forces are balanced.

• David and Delia will not move because their forces are unbalanced.

• David will move up, and Delia will move down because their forces are unbalanced.

•  David will move down, and Delia will move up because their forces are unbalanced.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

 A fourth grade class with 24 students is playing tug of war with a rope against their teacher. Which of the following BEST describes the expected outcome?

• The 24 students and the teacher will result in a tie since their forces are balanced.

• The results cannot be unpredicted since balanced and unbalanced forces are random.

• The teacher will win since the forces are balanced because the teacher will have more force pulling than all 24 students. 

• The 24 students will win since the forces are unbalanced because they will have more force pulling on their side compared to the one teacher.

Tags

NGSS.3-PS2-1

. Students want to investigate how a marble can demonstrate a balanced force. Which situation below would BEST demonstrate a balanced force?

• Student 1 sets up a ramp with a book and rolls a marble down the book.

• Student 2 pushes a marble along a smooth surface, and the marble rolls along the surface.

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

• Student 4 pushes a marble across carpet, and the marble slowly moves along the surface.

 Students were asked to show balanced and unbalanced forces in the classroom. Some of their investigations are below.

Investigation 1:Students pushed on the heavy art cabinet and neither the student nor the wall moved.

Investigation 2: Students pushed pencils across the desk.

Investigation 3: Students pulled on a ruler and neither of the students moved.

Investigation 4: Students pull on a chair and it slides on the floor. 

Which of the following BEST explains the results of the investigation?

• Investigations 1 and 3 demonstrate balanced forces since there was no movement, whereas investigations 2 and 4 demonstrate unbalanced forces since students caused objects to move.

• Investigations 1 and 3 demonstrate unbalanced forces since there was no movement, whereas investigations 2 and 4 demonstrate balanced forces since students caused objects to move.

• All the investigations demonstrate balanced forces since there were students and objects involved in each investigation.

• All the investigations demonstrate unbalanced forces since all of the investigations involved moving objects.

Tags

NGSS.MS-PS2-2

 A fourth grade student wants to investigate how friction affects the motion of a ball rolling on different surfaces after rolling down a ramp.

Carpet: The ball rolls 14 inches.

Tile : The ball rolls 22 inches

Which of the following best explains the results of the investigation?

• The ball rolling on the tile shows an unbalanced force since there was less friction than when the ball rolled on the carpet.

• The ball rolling on the carpet shows an unbalanced force since there was less friction than when the ball rolled on the tile.

• The ball rolling on the tile shows a balanced force since there was less friction than when the ball rolled on the carpet.

• The ball rolling on the carpet shows a balanced force since there was less friction than when the ball rolled on the tile.

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

A student is trying to move boxes of books. All of the books are the same size and weight. One box has 2 books and another box has 10 books.  What evidence could you use to support the claim that you need more force to move the box with 10 books?

• It will take more force because all of the books are the same size. 

• It will take more force because all of the books weigh the same.

• It will take more force because the box with 10 books weighs less.

• It will take more force because the box with 10 books weighs more.

Tags

NGSS.MS-PS2-2

4. A student claims that whenever they kick a soccer ball in the air, the force of gravity impacts the soccer ball. Which piece of evidence would support the student’s claim.

• The soccer ball moves at a quick speed the moment the student kicks the soccer ball.

• The soccer ball slows down and falls towards the ground.

• The soccer ball goes up towards the sky when kicked.

• The soccer ball is caught by the goalie.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

. Max must help his brother move their new stove into the house. He must help unload the stove from the truck, put it on a moving cart, prop open the front door of the house and unload the stove in the kitchen.

Materials Max Has:

Inclined Plane

Wheel and Axle

Wedge

From the list above, which question should Max ask to figure out that he should use the wheel and axle to move the stove from the truck?

• Will I need to elevate the stove from the sidewalk into the front door?

• Will I need to constantly keep the door open without shutting?

• Will I need to roll the stove from the truck to the front door?

• Will I need to elevate the stove to bring it inside the house?

Students in a classroom are investigating simple machines found around the school and playground. A student claims that a seesaw is a lever. 

What question could a friend ask to determine this claim is correct?

• Is a seesaw supported by a fulcrum to lift up a student?

• How does a wedge on a seesaw stay in place to lift up a student?

• Does a seesaw lift and lower a student through a rope and wheel system?

• Will a seesaw lift up a student by rotating with a wheel rotating around a rod?

Tags

NGSS.MS-PS2-2

6. A teacher is moving classrooms across the school and wants to make the move as easy as possible. Which of the following questions should the teacher ask to determine the best simple machine to use for the move?

• Should the teacher use an inclined plane to push all of the classroom objects from one place to another?

• Should the teacher use a wheel and axle to move the classroom objects from one place to another?

• Should the teacher use a lever to lift and move the classroom objects from one place to another?

• Should the teacher use a pulley to pull all of the classroom objects from one place to another?

Tags

NGSS.MS-ETS1-2

NGSS.MS-PS2-1