Compare the components that make up the windsurfer, his board, and his surroundings.

Atoms

Explanation:

The windsurfer, wind and water all the things in the surroundings are made up of matter. Matter is made up of atoms. Atoms are the smallest unit that cannot be simplified further. All solid liquids and gases are made up of atoms.  

An atom is made up of three sub particles that are known as protons electrons and neutrons. An atom typically weighs around 100 pm  (picometers)

Sample Response: The windsurfer, his board, and the air and water around him are all made of matter. That matter is made up of very small particles called atoms.

Explanation: