Topic
ice
2 questions tagged ice — spanning every one of the seven Ws.
why
Why do some icebergs look blue?
Blue icebergs are made of dense, bubble-free glacial ice that absorbs red light, so mostly blue light is scattered back to our eyes.
icelightpolar regions
how
How much of an iceberg is hidden underwater?
About 90% of an iceberg is hidden underwater: ice is less dense than seawater, so it floats, but only about a tenth of an iceberg shows above the surface — the rest lies hidden below.
oceanicescience