Water turning into ice is a physical change because it involves a change in state from liquid to solid without altering its chemical composition; both water (H₂O) and ice are made of the same molecules. The start product (liquid water) and end product (solid ice) differ in appearance and state, yet the chemical identity remains unchanged. Evidence of this physical change includes the temperature decrease and the formation of a rigid structure, signifying a transition in physical state rather than a chemical reaction.
In 2-3 sentences, describe why Water turning into ice is physical change. Key points you may include in your response.
• The definition of physical/chemical change
• The start/end products in a physical/chemical change
• The start/end appearance in a physical/chemical change
• The particular evidence observed to indicate a physical/chemical change.
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