2ND SIX WEEKS SKILLS REVIEW

A cook heats a meal in a microwave oven. What energy transformations occur between the microwave oven and the meal?

• Electrical energy→\rightarrow→light energy→\rightarrow→ chemical

• chemical energy→\rightarrow→ thermal energy→\rightarrow→ light energy

• Electrical energy→\right arrow→ electromagnetic energy→\right arrow→ thermal energy

• Chemical energy→\rightarrow→ electromagnetic energy→\rightarrow→ chemical energy

Tags

NGSS.MS-PS3-4

A bicycle rider is traveling up a hill. When the rider reaches the top of the hill, she stops to rest. Then she travels down the hill. The diagram shows the rider in the three different positions.

​Which of these correctly describes the potential energy and the kinetic energy of the bicycle rider?

• When the rider is at the top of the hill, her potential energy is the greatest, and her kinetic
  energy is the least.

• As the rider moves up the hill, her kinetic energy increases, and her potential energy
  decreases.

• When the rider goes down the hill, her potential energy increases, and her kinetic energy
  decreases.

• As the rider reaches the bottom of the hill, her kinetic energy and her potential energy
  decrease.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

The blades of a wind turbine are at rest until the movement of air causes the blades to spin.

​                            
​
​Which energy transformation happens when the blades are spinning as shown?

• Electrical to mechanical

• Chemical to electrical

• Mechanical to electrical

• Chemical to mechanical

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A demonstration helps students understand a principle of roller coaster design.
​
                               

​Which answer choice correctly describes the ball’s kinetic and potential energy?

• The ball has more potential energy at position X than at position Z.

• The ball has more kinetic energy at position Y than at position W.

• The potential energy and kinetic energy of the ball are equal at position X.

• The potential energy and kinetic energy of the ball are greatest at position Z.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A cook heats a meal in a microwave oven. What energy transformations occur between the microwave oven and the meal?

• Electrical energy→\rightarrow→light energy→\rightarrow→ chemical

• chemical energy→\rightarrow→ thermal energy→\rightarrow→ light energy

• Electrical energy→\rightarrow→ electromagnetic energy→\rightarrow→ thermal energy

  D

• Chemical energy→\rightarrow→ electromagnetic energy→\rightarrow→ chemical energy

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred?

• The chemical energy stored in the match changed to thermal energy and light energy.

• The thermal energy stored in the match changed to light energy and chemical energy

• C

  The light energy and thermal energy stored in the match changed to mechanical energy.

• The light energy and thermal energy stored in the match changed to chemical energy.

Tags

NGSS.MS-PS1-2

Which of the following is an example of energy conservation?

• 1. Turning the thermostat down in the winter months

• 1. Driving fewer miles by taking a shortcut to work

• 1. All of these are examples of energy conservation.

• 1. Unplugging the toaster when it is not being used

Tags

NGSS.MS-PS3-3

Which best describes potential energy?

• 1. Energy that is doing work

• 1. Stored energy

• 1. Energy of motion

• 1. Energy that used to do work

Tags

NGSS.MS-PS3-2

Which of the following best explains how a rocket lifts off the launchpad to move into space?

• 1. The force of the exploding fuel acts on the rocket

• 1. The force of the exploding fuel acts on a distant body; e.g., Earth or our moon

• 1. Gravitational fields interact, resulting in movement

• 1. Space contains molecules upon which force can act

Consider an object being pushed to the left with a force of 15 N and pushed to the right with a force of 10 N. What is the net force acting on this object?

• 1. 15 Newtons to the left

• 1. 25 Newtons

• 1. 5 Newtons to the right

• 1. 5 Newtons to the left

Tags

NGSS.MS-PS2-2