Question

look at the graph below: what phase change is occurring between points b and c? a evaporation b condensation c freezing d melting

Explanation:

Step1: Analyze phase - change types

Evaporation is liquid to gas, condensation is gas to liquid, freezing is liquid to solid, and melting is solid to liquid.

Step2: Interpret the graph

On a heating - cooling curve, the flat sections represent phase changes. Between points B and C, the substance is absorbing heat but the temperature is not changing, which is characteristic of a phase change. This is the melting phase where a solid is changing to a liquid while the temperature remains constant.

Answer:

D. Melting