What can be concluded if Object 1 caused Object 2 to get warmer upon contact?

When Object 1 caused Object 2 to get warmer upon contact, it indicates a transfer of thermal energy from Object 1 to Object 2. This transfer occurs because of the differences in temperature between the two objects, and it follows the principle that heat moves from a region of higher temperature (or higher thermal energy) to a region of lower temperature (or lower thermal energy).

The correct answer emphasizes that Object 1 had faster-moving particles. In the context of thermal energy, the temperature of an object is a measure of the average kinetic energy of its particles. Faster-moving particles mean that the object has a higher temperature, hence more thermal energy. When Object 1, with its higher kinetic energy, comes into contact with Object 2, it transfers this energy, causing Object 2’s particles to gain energy and move more rapidly, thereby increasing its temperature.

This conclusion is consistent with the fundamental principles of thermodynamics, specifically the second law, which addresses heat transfer and energy movement. The change in thermal state of Object 2 (warming) is a direct consequence of the interaction with Object 1’s higher-energy particles, which is why this option effectively explains the observed phenomenon.