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  2. 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 .

  3. Rayleigh scattering - Wikipedia

    en.wikipedia.org/wiki/Rayleigh_scattering

    the blackbody spectrum of sunlight coming into the Earth's atmosphere, Rayleigh scattering of that light off oxygen and nitrogen molecules, and; the response of the human visual system. The strong wavelength dependence of the Rayleigh scattering (~λ −4) means that shorter wavelengths are scattered more strongly than longer wavelengths. This ...

  4. List of primary education systems by country - Wikipedia

    en.wikipedia.org/wiki/List_of_primary_education...

    1st grade: 6 to 7 years old; 2nd grade: 7 to 8 years old; 3rd grade: 8 to 9 years old; 4th grade: 9 to 10 years old; 5th grade: 10 to 11 years old; 6th grade: 11 to 12 years old; 7th grade: 12 to 13 years old; 8th grade: 13 to 14 years old; 9th grade: 14 to 15 years old

  5. Albedo - Wikipedia

    en.wikipedia.org/wiki/Albedo

    Due to measurement constraints, it is often given for the spectrum in which most solar energy reaches the surface (between 0.3 and 3 μm). This spectrum includes visible light (0.4–0.7 μm), which explains why surfaces with a low albedo appear dark (e.g., trees absorb most radiation), whereas surfaces with a high albedo appear bright (e.g ...

  6. Five themes of geography - Wikipedia

    en.wikipedia.org/wiki/Five_themes_of_geography

    Most American geography and social studies classrooms have adopted the five themes in teaching practices, [3] as they provide "an alternative to the detrimental, but unfortunately persistent, habit of teaching geography through rote memorization". [1] They are pedagogical themes that guide how geographic content should be taught in schools. [4]

  7. US Supreme Court tosses case involving securities fraud suit ...

    www.aol.com/news/us-supreme-court-tosses-case...

    The justices, who heard arguments in the case on Nov. 6, dismissed Facebook's appeal of a lower court's ruling that allowed a 2018 class action led by Amalgamated Bank to proceed. The Supreme ...

  8. Geography - Wikipedia

    en.wikipedia.org/wiki/Geography

    Geography is an all-encompassing discipline that seeks an understanding of Earth and its human and natural complexities—not merely where objects are, but also how they have changed and come to be. While geography is specific to Earth, many concepts can be applied more broadly to other celestial bodies in the field of planetary science. [2]

  9. Earth science - Wikipedia

    en.wikipedia.org/wiki/Earth_science

    Physical geography is the study of Earth's systems and how they interact with one another as part of a single self-contained system. It incorporates astronomy, mathematical geography, meteorology, climatology, geology, geomorphology, biology, biogeography, pedology, and soils geography.

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