4. Consider the following statement with reference to Ice is less dense than water is a well know fact. What if it would have been denser than water?
- Lakes and oceans would freeze from the bottom up, almost certainly preventing the kind of chemistry that makes life possible.
- Increasing pressure would raise the freezing point of water. The deep oceans would be permanently frozen.
- A very large part of the planets Oxygen is produced by plankton in the ocean and this could be severely disrupted.
Which of the above statements is/are correct?