part 3: sorting real - world changes\nplace each situation in the correct column.\nsituations to sort:\n…

part 3: sorting real - world changes\nplace each situation in the correct column.\nsituations to sort:\n- ice melting in a cup\n- crushing a can\n- evaporation of rubbing alcohol\n- photosynthesis in a plant\n- food spoiling\n- combustion of gasoline\nphysical changes\nchemical changes

part 3: sorting real - world changes\nplace each situation in the correct column.\nsituations to sort:\n- ice melting in a cup\n- crushing a can\n- evaporation of rubbing alcohol\n- photosynthesis in a plant\n- food spoiling\n- combustion of gasoline\nphysical changes\nchemical changes

Answer

Brief Explanations:

To determine if a change is physical or chemical, we check for new substances. Physical changes retain the substance's identity, while chemical changes form new substances.

  • Physical Changes: Ice melting (solid to liquid water, same substance), crushing a can (shape change, same material), evaporation of rubbing alcohol (liquid to gas alcohol, same substance).
  • Chemical Changes: Photosynthesis (CO₂ + H₂O → glucose + O₂, new substances), food spoiling (microbial action, new compounds), combustion of gasoline (fuel + O₂ → CO₂ + H₂O, new substances).

Answer:

Physical Changes:

  • Ice melting in a cup
  • Crushing a can
  • Evaporation of rubbing alcohol

Chemical Changes:

  • Photosynthesis in a plant
  • Food spoiling
  • Combustion of gasoline