7.P.2.1 Lesson Review (NC Science Standard)

Use the data table and ball movement table to answer question #1.

Students investigate how the force of the wind affects the movement of equal-sized balls that have different masses.

As students observe, a wind blows equally on all of the balls. When the wind stops, students draw a picture of their results.

Which of the following can the students conclude from their data?

• Balls move easily when their mass is higher.

• Balls do not move because they have mass.

• Balls move farther when their mass is lower.

• Balls move quickly when their size is larger.

Tags

NGSS.MS-PS2-2

(1.P.1.1)

Use the picture below to answer question #2.

This soccer ball is moving to the right as shown by the arrow. Where should you place a pushing force to make the ball move in the opposite direction?

• point W

• point X

• point Y

• point Z

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

(7.P.2.1)

Which of the following is an example of potential energy?

• A glass jar sitting of a shelf.

• A flag waving in the wind.

• A ball rolling along a sidewalk.

• A battery powering a radio.

Tags

NGSS.MS-PS3-2

(7.P.2.1)

Use the diagram below to answer question #4.

In the classroom demonstration shown below, a rubber ball is dropped from Position 1. The ball bounces as shown. At which of these positions does the ball have both the greatest kinetic energy and the least potential energy?

• Position 1

• Position 2

• Position 3

• Position 4

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

(7.P.2.1)

Which of the following has the most kinetic energy?

• a basketball rolling down a hill

• a bus stopped at the top of a hill

• a truck parked on the top of a hill

• a golf ball at rest on the top of a hill

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

(7.P.2.1)

Use the diagram below to answer question #6. The diagram above shows four different devices. Which of the following types of energy is directly associated with each device?

• mechanical energy

• electromagnetic energy

• thermal energy

• electrical energy

Mechanical energy is a combination of which of the following?

• kinetic energy and potential energy

• potential energy and thermal energy

• kinetic energy and potential energy

• potential energy, kinetic energy and thermal energy

(7.P.2.1)

Ayana pulls back on a bow, getting ready to shoot an arrow. What forms the mechanical energy in the drawn bow?

• the elastic kinetic energy in the bow string

• the elastic electric energy in the bow string

• the elastic thermal energy in the bow string

• the elastic potential energy in the bow string

Tags

NGSS.MS-PS3-2

(7.P.2.1)

Which best describes a ball rolling down a ramp in relation to energy and change of energy?

• The ball begins with stored potential energy which changes to kinetic as the ball begins rolling.

• The ball begins with stored kinetic energy which changes to potential as the ball begins rolling.

• The ball begins with stored chemical energy and changes to gravitational as it begins rolling.

• The ball begins with stored gravitational energy and changes to chemical as it begins rolling.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

(7.P.2.1)

Which term is best described as the sum of potential and kinetic energy?

• nuclear energy

• thermal energy

• chemical energy

• mechanical energy

Tags

NGSS.MS-PS3-4