Question

1. henry was investigating physical and chemical changes in matter. which of these changes that henry found makes a chemical change occur? melting of ice, crushing a rock, evaporation of water, rusting of iron

Explanation:

A chemical change results in the formation of new substances with different chemical properties. Rusting of iron is a chemical change as iron reacts with oxygen and moisture to form iron - oxide (rust). Melting of ice, breaking a rock, and evaporation of water are physical changes. Melting of ice is a change of state from solid to liquid without changing the chemical composition (water remains H₂O). Breaking a rock only changes its physical form. Evaporation of water is a change of state from liquid to gas with no change in the chemical identity of water.

Answer:

rusting of iron