which of these are examples of physical changes? check all that apply. burning wood, freezing water, cutting…

which of these are examples of physical changes? check all that apply. burning wood, freezing water, cutting paper, iron rusting, mixing water and acetone. which of these are examples of chemical changes? check all that apply. burning a candle, boiling alcohol, frying an egg, melting an ice cube, making coffee

which of these are examples of physical changes? check all that apply. burning wood, freezing water, cutting paper, iron rusting, mixing water and acetone. which of these are examples of chemical changes? check all that apply. burning a candle, boiling alcohol, frying an egg, melting an ice cube, making coffee

Answer

Brief Explanations:

Physical changes do not change the chemical composition of a substance. Chemical changes result in new substances with different chemical properties. Freezing water, cutting paper, and mixing water and acetone are physical changes as the substances retain their chemical identity. Burning wood and iron rusting are chemical changes due to chemical reactions forming new substances. For the chemical - change part, burning a candle and frying an egg involve chemical reactions (combustion and protein - denaturation respectively), while boiling alcohol and melting an ice cube are physical changes (phase changes), and making coffee can involve both physical (dissolving) and chemical (extraction of flavors) aspects but is mainly considered a chemical change due to chemical reactions during roasting and extraction.

Answer:

Examples of physical changes: freezing water, cutting paper, mixing water and acetone. Examples of chemical changes: burning a candle, frying an egg, making coffee.