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  2. Meteoroid - Wikipedia

    en.wikipedia.org/wiki/Meteoroid

    A meteoroid (/ ˈ m iː t i ə r ɔɪ d / MEE-tee-ə-royd) [1] is a small rocky or metallic body in outer space. Meteoroids are distinguished as objects significantly smaller than asteroids , ranging in size from grains to objects up to 1 m (3 ft 3 in) wide. [ 2 ]

  3. Micrometeorite - Wikipedia

    en.wikipedia.org/wiki/Micrometeorite

    A micrometeorite is a micrometeoroid that has survived entry through the Earth's atmosphere.Usually found on Earth's surface, micrometeorites differ from meteorites in that they are smaller in size, more abundant, and different in composition.

  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. Elementary mathematics - Wikipedia

    en.wikipedia.org/wiki/Elementary_mathematics

    Elementary mathematics, also known as primary or secondary school mathematics, is the study of mathematics topics that are commonly taught at the primary or secondary school levels around the world. It includes a wide range of mathematical concepts and skills, including number sense , algebra , geometry , measurement , and data analysis .

  6. Massive Mars meteoroid strike that set off 'marsquake' helps ...

    www.aol.com/massive-mars-meteoroid-strike-set...

    Using artificial intelligence, scientists have discovered a crater from a meteoroid that they say shook material as deep as the Red Planet’s mantle: the layer between its crust and its core. The ...

  7. Glossary of meteoritics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_meteoritics

    Electrophonic bolide – a meteoroid which produces a measurable discharge of electromagnetic energy during its passage through the atmosphere. Enstatite achondrite – a meteorite that is mostly composed of enstatite. Usually part of the aubrite group. Enstatite chondrite – a rare form of meteorite thought to comprise only 2% of chondrites.

  8. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula.

  9. Micrometeoroid - Wikipedia

    en.wikipedia.org/wiki/Micrometeoroid

    A micrometeoroid is a tiny meteoroid: a small particle of rock in space, usually weighing less than a gram. A micrometeorite is such a particle that survives passage through Earth's atmosphere and reaches Earth's surface. The term "micrometeoroid" was officially deprecated by the IAU in 2017, as redundant to meteoroid. [1]