Question

glaciers have a high albedo. what happens as glaciers melt and expose darker rock or soil?
the color change will have no impact on albedo.
the reflection of sunlight increases, cooling earth.
the reflection of sunlight decreases, causing global warming.
more glaciers will form due to increased sunlight reflection.

Explanation:

Albedo is the measure of the reflection of solar energy. Glaciers with high albedo reflect a lot of sunlight. Darker rock or soil have lower albedo and reflect less sunlight. When glaciers melt and expose darker surfaces, less sunlight is reflected, which leads to more heat being absorbed and contributes to global warming.

Answer:

The reflection of sunlight decreases, causing global warming.