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  2. Primary education in the United States - Wikipedia

    en.wikipedia.org/wiki/Primary_education_in_the...

    Elementary schools normally continue through sixth grade, [4] which the students normally complete when they are age 11 or 12. Some elementary schools graduate after the 4th or 5th grade and transition students into a middle school. In 2016, there were 88,665 elementary schools (66,758 public and 21,907 private) in the United States. [5]

  3. K-5 (education) - Wikipedia

    en.wikipedia.org/wiki/K-5_(education)

    K-5 (pronounced "kay through five") is an American term for the education period from kindergarten to fifth grade. It receives equal amounts of criticism and support in the educational industry. It receives equal amounts of criticism and support in the educational industry.

  4. Electromagnetic spectrum - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_spectrum

    By definition, visible light is the part of the EM spectrum the human eye is the most sensitive to. Visible light (and near-infrared light) is typically absorbed and emitted by electrons in molecules and atoms that move from one energy level to another. This action allows the chemical mechanisms that underlie human vision and plant photosynthesis.

  5. Greenlanders are worried to find themselves on Trump's ...

    www.aol.com/greenlanders-worried-themselves...

    Another resident, Edvard Jensen, was more dismissive, telling DR that he didn’t believe Trump would invade Greenland. “He just wants the attention, and now he has it.”

  6. Trump could be offered second state visit to UK, Telegraph ...

    www.aol.com/news/trump-could-offered-second...

    Downing Street and the Foreign Office are preparing to offer the incoming U.S. president an invitation once he is back in the White House, the report said, without citing specific sourcing. The ...

  7. A.J. Brown's sideline read skyrockets to No. 1 hottest seller ...

    www.aol.com/j-browns-sideline-read-skyrockets...

    Philadelphia Eagles star receiver A.J. Brown could launch a book club of his own after a little sideline reading skyrocketed self-help author Jim Murphy to the hottest seller on Amazon overnight.

  8. Sound - Wikipedia

    en.wikipedia.org/wiki/Sound

    In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. [1]

  9. Light - Wikipedia

    en.wikipedia.org/wiki/Light

    Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. [1] Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz .

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