Question

edpuzzle - chemical and physical changes (physical vs. chemical changes - ex edpuzzle edpuzzle.com multiple-choice question check all examples that are chemical changes. sugar fermenting to alcohol ice melting to water a nail rusting newspapers burning

Explanation:

To determine chemical changes, we identify processes with new substances formed:

• Sugar fermenting to alcohol: Fermentation produces alcohol (new substance), so it's a chemical change.
• Ice melting to water: Only state (solid to liquid) changes, no new substance—physical change.
• A nail rusting: Rust (iron oxide) is a new substance, so chemical change.
• Newspapers burning: Combustion produces ash, gases, etc. (new substances), chemical change.

Answer:

• sugar fermenting to alcohol
• a nail rusting
• newspapers burning