Which form of energy transfer works in empty space?

Study for the North Carolina Grade 8 End-of-Grade Science Test. Prepare with multiple choice questions, each question has hints and explanations. Ace your exam!

Multiple Choice

Which form of energy transfer works in empty space?

Explanation:
In empty space, energy moves by radiation. That’s because there are hardly any particles to collide with, so heat can’t be transferred by touching (conduction) or by moving fluids (convection). Radiation uses electromagnetic waves to carry energy, and these waves can travel through a vacuum, which is why the Sun’s energy reaches Earth without needing a medium. Reflection isn’t a separate way energy moves through space; it describes how light bounces off surfaces, whereas the actual energy transport in space happens via radiation. So the form of energy transfer that works in empty space is radiation.

In empty space, energy moves by radiation. That’s because there are hardly any particles to collide with, so heat can’t be transferred by touching (conduction) or by moving fluids (convection). Radiation uses electromagnetic waves to carry energy, and these waves can travel through a vacuum, which is why the Sun’s energy reaches Earth without needing a medium. Reflection isn’t a separate way energy moves through space; it describes how light bounces off surfaces, whereas the actual energy transport in space happens via radiation. So the form of energy transfer that works in empty space is radiation.

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