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One of the best-known impact craters is the Arizona crater in the USA, which is 1280 metres across and 180 metres deep.

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The largest stony meteorite weighs about a tonne, and the Allende carbonaceous chondrite was a series of chunks that totalled about five tonnes. The largest meteorite that has been found is the 60 tonne Hoba iron meteorite. What is the largest meteorite ever found? They are of different types: stony meteorites, iron meteorites and the rare carbonaceous chondrites. More than 2000 meteorites have been recovered. The speed with which small meteorites hit the ground can be around 500 km/h. The outer layers will disappear, but the centre is likely to survive and will hit the ground as a meteorite. When larger chunks of interplanetary matter enter the atmosphere it is unlikely that the whole chunk will be evaporated. It’s very unpredictable you can’t really tell when it’s going to happen, but when it does it’s possible to see thousands of meteors per hour for one or two hours. Associated with comet 8P/TuttleĪ meteor storm occurs when you go through a really unusually dense part of a comet’s debris cloud. Associated with Comet Halleyįast bright meteors with fine trains. Associated with Comet Swift-Tuttle (1737, 1862, 1992)Īssociated with Comet 21/P Giacobini-Zimmerįast with fine trains. Steady stream of meteors over several days but a low rate per hour

All rights reserved.Bluish- or yellowish-white meteors with fine trainsīright fast meteors, some with trains. Starfall® and ® are registered trademarks in the U.S., the European Union, and various other countries.Ĭopyright © 2002– 2018 by Starfall Education and its licensors. The Starfall Website is a program service of Starfall Education Foundation, a publicly supported nonprofit organization, 501(c)(3). The teacher-guided and child-directed nature of our curriculum products ensures English language learners and struggling readers learn alongside their peers. Our methodology motivates children in an atmosphere of imagination and play. Our Starfall Kindergarten Math, English Language Arts, and Pre-K curricula are all available for purchase in the Starfall Store ™, and as downloads in our Parent-Teacher Center ™.

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Our new Starfall Parent-Teacher Center ™ is available free for everyone and includes supplemental custom worksheets, curriculum downloads, informative guides, all the latest Starfall news and much more for our grownup audience. Your child will have fun learning essential reading and math skills through exploration! Your membership fee ensures that we can continue to provide Classic Starfall free of charge and offer low-cost, high-quality, educational resources to classrooms. Our low-cost membership program expands the free content you already enjoy to include delightfully animated songs, mathematics, and reading activities spanning pre-k to 2nd grade.

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Starfall has been teaching children to read with phonics for well over a decade.

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On July 1, 2015, the Polis-Schutz family donated their full interest in Starfall to the Starfall Education Foundation. The website opened in September of 2002 as a free public service and social enterprise supported by the Polis-Schutz family.