Benchmark 8B
The Designed World: Materials and Manufacturing
Grades 3-5, page 188

Through science and technology, a wide variety of materials that do not appear in nature at all have become available, ranging from steel to nylon to liquid crystals.
 

NSES Content Standard E 
Science and Technology: Abilities to distinguish between natural objects and objects made by humans
Grades K-4, page 138
Some objects occur in nature; others have been designed and made by people to solve human problems and enhance the quality of life.

NSES Content Standard E 
Science and Technology: Abilities to distinguish between natural objects and objects made by humans
Grades K-4, page 138
Objects can be categorized into two groups, natural and designed.