Review

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Tags

NGSS.MS-PS2-1

What slows down the motion of an object or keeps it from starting?

• mass
• friction
• gravity
• magnetism

Tags

NGSS.MS-PS2-2

What is motion?

• It's like the ocean
• Any change in an animal or person's position.
• Motion is like acting
• Any change in an object or person's position.

Tags

NGSS.MS-PS2-2

What pulls a ball back to earth?

• Gas
• Gravity
• Friction
• Molecules

Tags

NGSS.MS-PS2-4

What is force?

• A force is a push or a pull upon an object resulting from the object's interaction with another object.
• something used in Star Wars 
• It is the amount of space between two points.
• It is Superman's power

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If you pull the cord, what direction will the box move?

• Up
• Down
• Left
• Right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Students conducted an investigation in which they measured the distance a toy car traveled after rolling down a ramp covered with sandpaper or wax paper. Which of these questions can the students answer by analyzing the results of their investigation?

• How does changing the height of a ramp affect the distance a toy car rolls?

• How does changing the surface of a ramp affect the distance a toy car rolls?

• How does mass affect the distance a toy car moves after rolling down a ramp?

• How does the design of a toy car affect its movement after rolling down a ramp?

Some students wanted to find out if a tennis ball and a baseball dropped from the same height hit the ground at the same time. This investigation tests the effect of which of the following?

• Wind

• Friction

• Magnetism

• Gravity

Tags

NGSS.MS-PS2-4

Students conducted an investigation in which they rolled a soda can down a ramp that was 30 cm high and one that was 40 cm high. Which question were the students most likely trying to answer?

• How does mass of a soda can affect the distance it will roll?

• How does surface friction affect the distance a soda can will roll?

• How does the size of a soda can affect the distance it rolls?

• How does ramp height affect the distance a soda can rolls?

Students taped a rubber band to a box of washers, then dragged the box across four different surfaces, using the rubber band.

The students are using the distance the rubber band stretches to measure the amount of friction each surface exerts on the box. Based on the observations shown here, which surface had the greatest amount of friction?

• Surface A

• Surface B

• Surface C

• Surface D

Tags

NGSS.MS-PS2-2