Some extras...
Question: If something is thrown at you, what will be more painful? Ice or water?
Answer: Ice. Why? Though ice is less dense, ice is "harder" than water. When water hits, you will just get splashed and wet. However, if ice hits you, it is harder than water, and it will have a greater uimpact on you than water, therefore, causing more pain than water.
Question: What are the effects of impurities in water?
Answer: The effects depends on the impurity. Whatever it is, the common thing is that the water's freezing/melting and boiling point will change. For example, if you add salt to water, the freezing point will decrease.
Question: What will the water level be? A, B or C?
Answer: I think it will be A. Ice is frozen water. When the ice melts, it will add more water to the current amount of water. Hence, causing the water level to rise.
Some questions...
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