Topic
Lakes and Rivers
2 questions tagged Lakes and Rivers — spanning every one of the seven Ws.
why
Why do some rivers freeze into long sheets while others keep flowing in winter?
Shallow, slow-moving rivers with cold air and little turbulence freeze more easily than fast, deep rivers. Moving water and heat from deeper flow help keep some channels open.
NatureLakes and Rivers
why
Why do some lakes and rivers freeze from the top down instead of all at once?
Water freezes from the top down because ice is less dense than liquid water and floats. The ice layer insulates the water below, slowing further freezing.
NatureLakes and Rivers