Energy Transformations and Experiments

Mr. Peterson reviews last week's exit slips, focusing on a tricky question about energy production. He explains that generators convert rather than produce energy. The class then explores energy conversion through two experiments: one with kinetic energy using sand and another with chemical energy using calcium chloride. The lesson concludes with a reminder to complete the exit slip.

What is the correct statement about generators and energy?

• Generators create energy.

• Generators destroy energy.

• Generators convert energy from one form to another.

• Generators store energy.

Which of the following can be used to spin a generator?

• Sand and gravel

• Sunlight and moonlight

• Fire and ice

• Wind and water

What is the purpose of the first experiment with sand?

• To observe the color change in sand

• To convert kinetic energy into heat energy

• To measure the weight of sand

• To see how sand reacts with water

Why did the temperature of the half-full cup of sand increase more than the full cup?

• The full cup was shaken more.

• The half-full cup was in sunlight.

• The energy was spread over less sand, increasing temperature.

• The half-full cup had more sand.

What is the main concept demonstrated by the sand shaking experiment?

• Sand can change color.

• Sand can dissolve in water.

• Energy can be transferred and converted.

• Energy can be created.

What chemical is added to water in the second experiment?

• Calcium chloride

• Potassium chloride

• Sodium chloride

• Magnesium chloride

What happens to the temperature when calcium chloride is mixed with water?

• The temperature remains the same.

• The temperature fluctuates.

• The temperature decreases.

• The temperature increases.

What type of energy transformation is demonstrated in the chemical experiment?

• Kinetic to potential energy

• Chemical to heat energy

• Electrical to chemical energy

• Light to chemical energy

Why is it important not to touch the thermometer in the chemical experiment?

• It might break.

• It could affect the temperature reading.

• It will change color.

• It will dissolve in water.

What is the initial temperature of the water used in the chemical experiment?

• 74 degrees

• 100 degrees

• 57 degrees

• 98 degrees