Unit 5

Fill in the blank. Word Bank: kinetic, potential, increases, decreases. 4. Students are investigating changes in potential and kinetic energy by making a ramp with a plastic ruler propped up on a book and rolling a marble down the ramp. Explain the changes in potential and kinetic energy of the marble as its position on the ruler changes. At the top of the ruler, the _________ energy of the marble is at its highest. As the marble rolls, ​​​the potential energy of the marble _________ as its kinetic energy _________.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

In the picture on the right, the students aren’t moving because

• They aren’t strong enough

• The forces on the rope are balanced

• The forces on the rope are unbalanced

• The students aren’t pulling hard enough

Tags

NGSS.MS-PS2-2

An image of a toy rocket and forces are shown below. Assuming the only two forces on the toy rocket are lift and gravity, which of the following combinations would result in the rocket moving upward?

• Lift = 5 Newtons / Gravity = 5 Newtons

• Lift = 3 Newtons / Gravity = 4 Newtons

• Lift = 5 Newtons / Gravity = 4 Newtons

• Lift = 4 Newtons / Gravity = 4 Newtons

Tags

NGSS.MS-PS2-2

The graph below represents the motion of a car. During what time was the car moving the fastest?

• From 0 to 2 minutes

• From 2 to 4 minutes

• From 4 to 6 minutes

• From 6 to 8 minutes

Tags

NGSS.MS-PS3-1

Paul’s family is moving across town, so his father rented a moving truck for the day. A ramp pulls out of the truck bed. The bed of the truck is 1 m high, and the ramp is 3 m long. Paul makes two statements about the truck ramp.

Statement 1: The ramp is an inclined plane, and we will have to move the boxes a longer distance to get them into the truck than if we lifted them straight up.

Statement 2: Using the inclined plane will require less effort.

Select two correct answers!!

• Statement 1 is true

• Statement 1 is false

• Statement 2 is true

• Statement 2 is false

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

The diagram shows a wooden block being pulled up an inclined plane that is 30 cm in height. Using the inclined plane reduces the amount of force needed to lift the block, while increasing the -

• mass of the wooden block.

• surface area of the block.

• pull of gravity on the block.

• distance the block must move.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A toy car rolls 10 meters in 2 seconds.  What is the average speed of the toy car? Enter your answer in the box. Correct units of measurement are required.

Tags

NGSS.MS-PS3-1

Students begin to measure the speed of a ball rolling down a ramp. The graph below shows their results.

What is the average speed of the ball?

• 4 m/s

• 5 m/s

• 14 m/s

• 20 m/s

Tags

NGSS.MS-PS3-1

The graph below shows distance over time.

• A. A student walks 1.5 km to a friend’s house in 40 minutes. The two students then walk another 1.5 km to school in 20 minutes.

• B. A student walks 1.5 km to a friend’s house in 20 minutes. The two students then walk another 1.5 km to school in 40 minutes.

• C. A student walks 1.5 km to a friend’s house in 20 minutes. The two students then walk another 1.5 km to school in 60 minutes.

• D.A student walks 1.5 km to a friend’s house in 30 minutes. The two students then walk another 1.5 km to school in 30 minutes

Tags

NGSS.MS-PS3-1

What kind of clouds are these?

• stratus clouds

• cumulus clouds

• cirrus clouds

Tags

NGSS.MS-ESS2-5