HHE 1.3b Day II Justifications

​Lesson Objective:

I will review the WFA and identify the mistakes I made. ​

​Lesson Vocabulary:

1. electrical energy

2. mechanical energy

3. chemical energy

4. potential energy

5. kinetic energy

6. thermal energy​

​Language Objective:

I will discuss and justify my reasoning for each question using the justification ABC process. ​

​CFU:

1. Complete justifications

2. TRY

3. Pay attention to the notes Mrs. Bailey takes

   ​

​Justifications:

1. number each justification

2. A- wrong answer and why

3. B- almost correct. how could you make it correct?

4. C- correct answer and why!!​

Multiple Choice

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

Multiple Choice

Which statement describes the energy changes that occur when water in a tea kettle is heated on a stove that uses natural gas?

• Some of the chemical energy in the natural gas transforms into thermal energy, which heats the water. Then some of the thermal energy changes into sound energy when the water forms steam and the steam leaves the kettle.

• Some of the thermal energy in the natural gas transforms into sound energy when the water becomes hot. Then some of the sound energy changes into light energy when the kettle becomes warm.

• Some of the electrical energy in the natural gas transforms into thermal energy, which causes the water to form steam. Then some of the thermal energy changes into sound energy and light energy when the steam leaves the kettle.

• Some of the light energy in the natural gas transforms into chemical energy in the water. Then some of the chemical energy changes into kinetic energy when steam leaves the kettle and into sound energy when the water boils.

Multiple Choice

The diagram below shows how coal is a fuel source that uses heat energy to turn mechanical energy into electrical energy. Between which two points is heat energy converted into mechanical energy?

• 1 and 2

• 2 and 3

• 3 and 4

• 6 and 7

Multiple Choice

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

Multiple Choice

Marshall and his friends like to skateboard in an empty swimming pool. The picture below shows a cross-section of the swimming pool. Several points along Marshall's path have been labeled. At which point is Marshall's potential energy the greatest?

• point A

• point B

• point C

• point D

Multiple Choice

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.