what happens when you add heat to an object and when you cool an object

When you heat up an object three things could possibly happen:i) Increase in temperature of the object. Imagine heating up water, the temperature increases.ii)  Linear Expansion: The object could increase in length. For example if you heat up a steel rod, the length would increase as a result of linear expansion.iii) Change of State: The object could change from solid state to liquid state or from liquid state to gaseous state, as the case may be. For example heating ice block to liquid water.