When you look around, you perceive objects with sizes that belong to a limited range known as macroscopic scale of observation (insects, clouds, etc.).
The material world which our eyes cannot observe is known as the microscopic scale of observation (cells, atoms, molecules, etc.).
The macroscopic phenomena that take place in nature are determined by the microscopic phenomena that they are made of.
Select an object in the following visual and note the scale of observation that is being used.