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  2. Category:Natural sciences - Wikipedia

    en.wikipedia.org/wiki/Category:Natural_sciences

    The natural sciences are those branches of empirical science that produce a comprehension of the natural world through the use of data collected from it by observation and measurement to construct deterministic and/or stochastic quantitative models of its phenomena.

  3. Project Learning Tree - Wikipedia

    en.wikipedia.org/wiki/Project_Learning_Tree

    Project Learning Tree (PLT) is an environmental education program for teaching children about trees and forests using hands-on activities.It was created in 1976, after passage of the first National Environmental Education Act in 1970 and celebration of the first Earth Day in 1970, raised the profile of environmental education in the United States.

  4. Sixth grade - Wikipedia

    en.wikipedia.org/wiki/Sixth_grade

    Sixth grade (also 6th grade or grade 6) is the sixth year of formal or compulsory education. Students in sixth grade are usually 11-12 years old. Students in sixth grade are usually 11-12 years old. It is commonly the first or second grade of middle school or the last grade of elementary school, and the sixth school year since kindergarten .

  5. Kingdom (biology) - Wikipedia

    en.wikipedia.org/wiki/Kingdom_(biology)

    In 1998, Cavalier-Smith published a six-kingdom model, [6] which has been revised in subsequent papers. The version published in 2009 is shown below. The version published in 2009 is shown below. [ 20 ] [ a ] [ 21 ] Cavalier-Smith no longer accepted the importance of the fundamental Eubacteria–Archaebacteria divide put forward by Woese and ...

  6. Patterns in nature - Wikipedia

    en.wikipedia.org/wiki/Patterns_in_nature

    Natural patterns are sometimes formed by animals, as in the Mima mounds of the Northwestern United States and some other areas, which appear to be created over many years by the burrowing activities of pocket gophers, [90] while the so-called fairy circles of Namibia appear to be created by the interaction of competing groups of sand termites ...

  7. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Mathematics is essential in the natural sciences, engineering, medicine, finance, computer science, and the social sciences. Although mathematics is extensively used for modeling phenomena, the fundamental truths of mathematics are independent of any scientific experimentation.