Question

Zander is conducting an investigation using a video. Which statement best describes what Zander is testing in his experiment?

a) Zander is testing the process of melting, which is a physical change that occurs when a substance changes from a gas into a liquid due to a change in temperature.

b) Zander is testing the process of melting, which is a physical change that occurs when a substance changes from a solid into a liquid due to an increase in temperature.

c) Zander is testing the process of condensation, which is a phase change that occurs when a substance changes from a gas into a liquid due to a decrease in temperature.

d) Zander is testing the process of evaporation, which is a phase change that occurs when a substance changes from a liquid into a gas due to a decrease in temperature.

Answer 1

Zander is testing the melting process where a solid changes into a liquid due to an increase in temperature, which is a physical change maintaining the substance's composition.

Step-by-step explanation:

Zander is conducting an investigation to observe a phase change. The statement that best describes what Zander is testing in his experiment is (b), Zander is testing the process of melting, which is a physical change that occurs when a substance changes from a solid into a liquid due to an increase in temperature. This is because melting involves heat being absorbed by a solid, causing it to transition into a liquid state; this process is a classic example of a physical change as the substance's composition does not alter, only its state.

In contrast, other phase changes such as condensation and vaporization also involve a physical process where the substance transitions between gas and liquid phases, or liquid and gas phases respectively, due to changes in temperature.