Ace the 8th Natural Resources Challenge 2026 – Unleash Your Eco-Savvy Skills!

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The warmth a home receives as solar energy enters through a window is known as what type of solar energy?

Active

Passive

Passive solar energy is at work here. When sunlight enters through a window, it travels as radiant energy and is absorbed by interior surfaces and any thermal mass, warming the room. The heat is then released slowly to maintain comfort without any mechanical systems. This is different from active solar, which uses pumps or collectors to move or convert heat, and it clarifies why radiant energy describes the form of heat, while kinetic energy refers to motion and isn’t relevant to this heating method.

Radiant

Kinetic