3rd Grade Science LEAP Prep

This box is sitting on a table. You want to understand the changing forces that act on the box. Which of the following investigations would help you do this?

• Describe the direction the box is pushing on the table.

• Observe that the box is not moving. That means there are no forces acting on it.

• Hang weights from the hook. The weights will push on the box.

• Hang weights from the hook. The weights will pull on the box. The box will slide to the end of the table.

Tags

NGSS.MS-PS2-2

Vincent wants to move an object using touching forces. Which test will show that touching forces will move objects?

• He could drop a feather from several different heights and see how fast it falls.

• He could pull a toy car with a string until it hits another toy car.

• He could rub a ballon on his shirt and hold it over his head to make his hair stand up.

• He could use a magnet to pull a stack of paper clips from one end of the table to another.

Tags

NGSS.MS-PS2-2

Click on the picture of a person kicking a soccer ball. The picture shows the path of the ball. Predict how the path of the ball will continue after step 5.

• It will go up.

• It will go down.

• It will go backward.

• It will stay in the air.

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?

• It will stay on the left side.

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

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

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

Anna is learning about magnets. She wants to set up these magnets so they repel one another. Will this set up, shown above, repel the magnets? Explain.

• Yes, since the opposite sides of the magnets are facing each other, they will repel each other.

• Yes, since the same sides of the magnets are facing each other, they will repel each other.

• No, because the opposite sides of the magnets are facing each other.

• No, because the same sides of the magnets are facing each other.

Tags

NGSS.MS-PS2-5

A group of science students needs to teach their classmates about non-touching forces. They will do this by showing them a demonstration. To come up with ideas for their demonstration, the students come up with questions about non-touching forces. Which student asks the most useful question?

• Elaine asks about how many different ways a magnet can slide on a table.

• Paul asks what color each of the magnets’ sides are.

• Arya asks if there is a way to make the magnets stronger.

• Anthony asks if they can make magnets move toward each other.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Dora plans an investigation using one magnet to pick up a pile of metal paper clips. She already knows that the paper clips will stick to the magnet because the two objects attract. Which question can Dora answer by carrying out her investigation?

• What materials are used to make a magnet?

• Why do paper clips bend easily if they are made from metal?

• At what distance will the magnet be able to pick up the paper clips?

• What touching forces are making the paper clips stick to the magnet?

Tags

NGSS.MS-PS2-5

Leaders in a city want to sort through the city’s landfill to pick out metal cans that can be

recycled. It would take a long time to do this work by hand. Engineers decide to build a big

magnet to move above large piles of trash. Magnets attract metal. What do you think the

engineers believe will happen as a result of their plan?

• The magnet will draw the metal cans up and out of the trash piles.

• The magnet will cause the metal cans to move to the side into a neat pile.

• The magnet will flatten and recycle the cans while they are being collected.

• The magnet will use electricity to sort the metal cans from the nonmetal items.

Tags

NGSS.MS-PS2-3

Juan sets up three different magnets at different distances from metal paper clips. He collects data in the table below. What conclusion can Juan make by looking at his data?

• Magnets will attract paper clips at any distance.

• Magnets will attract paper clips the farther they are from the magnet.

• Magnets will attract paper clips that are made of nonmetal.

• Magnets will attract paper clips that are closer to the magnet.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Gia bounces a ball across a playground. Each time the ball bounces, it goes less high in the air. When the ball reaches the middle of the playground, it only bounces half as high as it did on the first bounce. What would most likely happen by the time the ball reaches the far side of the playground?

• The ball would pick up speed.

• The ball would soon stop bouncing.

• The ball would stay in the air longer.

• The ball would roll back to the student.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5