What is the difference between evaporation and boiling-?

The difference in evaporation and boiling is simple. Just imagine a beaker and being placed on the hot plate. The liquid it beginning to evaporate and the their is a gradient in the water because not all of the water is reaching 100 degrees Celsius at once. Some of it is beginning to evaporate (change in the state from a liquid to a gas) the other is beginning to boil! Remember boiling is a characteristic property and once it is reached the temperature doesn't continue to increase. Hope this helped!
Vaporization if the phase change from a liquid to a gas. Evaporation and boiling are both mechanisms for vaporization to occur. Evaporation occurs at the surface of the liquid. It is the primary method by which water moves from bodies of water into the atmosphere. It is a much slower process than boiling. Boiling occurs when a liquid is heated to the boiling point. During boiling, water evaporates throughout the entire liquid very fast, rather than just at the surface.
Evaporation happens only at the surface of a liquid and occurs at any temperature (so long as the substance is a liquid at that temperature). However, as most people are aware, liquids evaporates faster at a higher temperature. Boiling, on the other hand, happens throughout the bulk of a liquid, usually starting from some site on the inside of the container and rising in a bubble to the surface. It only happens when the temperature is above the boiling point of that substance.