1. When a cup of water is in a freezer, for a while, some of it's ice and some of it's liquid. Does that mean the liquid part has not hit freezing temperature yet or does the changeover from liquid to solid take a while, even at freezing temperature? 2. When a pot of water gets hot enough, small bubbles form. Is that considered boiling ? 3. When a pot of water is boiling vigorously, some of it is steam and some of it is water. Does that mean the water that is still liquid has not hit boiling temperature yet or does the change over from liquid to steam take a while, even at boiling temperature?