Earth's Frozen Poles
NASA
Answer questions like ...
- What proportion of the world's freshwater is stored in glaciers and ice caps?
- Ice sheets are made of snow that builds up and gets compressed into ice, which then flows downhill toward the coast. What controls the mass of the Greenland and Antarctica ice sheets?
- "Albedo" is a measure of an object's "brightness" — i.e., how much of the sunlight that hits the surface is reflected away. Which has a higher albedo?
