Understanding Energy Concepts

What is the main reason the world of energy is considered complex?

• It involves a lot of math.

• It has its own unique language.

• It is constantly changing.

• It is only for scientists.

How is power different from energy?

• Power is always greater than energy.

• Power is a type of energy.

• Power is the rate at which energy is used.

• Power is measured in calories.

What unit is used to measure energy?

• Kilowatts

• Watts

• Amperes

• Joules

What does the second law of thermodynamics imply about energy conversion?

• Energy conversion is 100% efficient.

• Energy can be created.

• Energy conversion results in some loss.

• Energy can be destroyed.

Why can't we turn heat and ash back into wood?

• Because of the first law of thermodynamics.

• Because of entropy.

• Because of energy abundance.

• Because of energy creation.

What is a major source of renewable energy on Earth?

• The sun

• Natural gas

• Fossil fuels

• Nuclear power

What percentage of energy produced in the US is lost to waste?

• 60%

• 90%

• 10%

• 30%

What is a key factor in reducing energy waste?

• Using more fossil fuels

• Developing more efficient technologies

• Increasing energy production

• Decreasing energy consumption

How many joules of energy can a single lightning bolt carry?

• 20 billion

• 10 billion

• 5 billion

• 1 billion

What is the potential of using lightning strikes for energy?

• They can power small devices.

• They can power a few homes.

• They are not useful for energy.

• They can power thousands of flux capacitors.