Heat flows from the tea to the ice. Cold flows from the ice to the tea. Cold flows from the ice, and heat flows from the tea. Heat flows simultaneously between the ice and the tea.
I gave my students this multiple choice question: Which statement describes the transfer of energy when an ice cube is placed in a cup of hot tea?

Only one answer is correct among these 4 choices:
- Heat flows from the tea to the ice.
- Cold flows from the ice to the tea.
- Cold flows from the ice, and heat flows from the tea.
- Heat flows simultaneously between the ice and the tea.

Could you tell me which one is correct?

Heat flows from the tea to the ice.