If ice is warmed and becomes a liquid which type of process is it

Explanation:

Endothermic means that the process makes that the system (substance) absorbs heat energy from the surroundings. In this case the heat is supplied to the ice (from a flame for example). So, the ice is absorbing this heat.

In general, the phase change from solid (ice) to liquid is endothermic because the solid substance has a lower kinetic energy than the liquid particles. So, the solid must gain energy (which is supplied in the form of heat) to become liquid.

The reason why the solid particles have lower kinetic energy than liquid ones is that the particles vibrate and translates quicker in the liquid state than in the solid state.

it means there are 3 atoms of oxygen