In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 

To test batteries to see if they're any good,
drop the batteries and see if they bounce once to see if they're good.

To protect your skin from sun damage,
apply sun screen prior to exposing your skin to the sun.

The best form of head for making watermelon

The microwave oven is the best for making them.