Question

what happens when thermal energy is applied to water? (1 point)
its molecules lose kinetic energy.
the water creates steam as soon as thermal energy is applied.
its molecules gain kinetic energy.
its molecules gain potential energy.

Explanation:

• Analyze Option 1: When thermal energy is applied, molecules' kinetic energy should increase (not lose), so this is wrong.
• Analyze Option 2: Water doesn't turn to steam immediately upon thermal energy application (needs enough energy to reach boiling point), so this is wrong.
• Analyze Option 3: Thermal energy (heat) increases the motion of molecules, so they gain kinetic energy. This is correct.
• Analyze Option 4: Thermal energy primarily affects kinetic energy (motion) of molecules, not potential energy (related to position/structure), so this is wrong.

Answer:

C. Its molecules gain kinetic energy.