Question

a student fills a glass with warm water and adds ice cubes. why does the water become colder? a. conduction causes heat energy to move from the water into the ice cubes. b. convection causes cold energy to move from the ice cubes into the water. c. conduction causes cold energy to move from the ice cubes into the water. d. convection causes heat energy to move from the water into the ice cubes.

Explanation:

Heat transfer occurs through conduction when there is direct contact between substances at different temperatures. In this case, the warm - water and ice cubes are in direct contact. Heat energy always moves from a region of higher temperature (warm water) to a region of lower temperature (ice cubes) through conduction. There is no such thing as "cold energy." Convection involves the movement of fluids and is not the main process here as the focus is on the direct contact between water and ice.

Answer:

A. Conduction causes heat energy to move from the water into the ice cubes.