Albedo is a measure of reflectivity, expressed on a scale from 0 to 1. A perfectly black body has an albedo of 0 because it absorbs all incoming radiation and reflects nothing. In contrast, a perfect white surface (like fresh snow) would have an albedo close to 1.0, meaning it reflects nearly all the light that hits it. ANSWER: (C) 0 (0%)
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In atmospheric science, albedo determines how much solar energy the planet retains. Darker surfaces, like the ocean or asphalt, have low albedo (around 0.06 to 0.10) and absorb more heat. Brighter surfaces, like ice caps or thick clouds, have high albedo (0.80+) and help cool the planet. As global temperatures rise and sea ice melts, the Earth’s overall albedo decreases. This causes the planet to absorb more heat, leading to further melting—a dangerous cycle known as the “ice-albedo feedback.” This makes understanding the albedo of various atmospheric and surface components critical for climate modeling.
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