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    Meteors (Group 10)

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    Valerie
    Meteoroids are small pieces of rock or metal that travel through space. When they enter Earth's atmosphere, they glow brightly from friction and are called meteors. Most burn up in the atmosphere, but some survive as meteorites that reach the ground. Meteorites come in three main types - stony, iron, and stony-iron. Meteor showers occur when Earth passes through streams of cosmic debris, causing many meteors to appear to radiate from the same point in the sky. Impacts from meteorites can form craters on planetary surfaces.

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    Meteors (Group 10)

    Uploaded by

    Valerie
    80 views32 pages
    Meteoroids are small pieces of rock or metal that travel through space. When they enter Earth's atmosphere, they glow brightly from friction and are called meteors. Most burn up in the atmosphere, but some survive as meteorites that reach the ground. Meteorites come in three main types - stony, iron, and stony-iron. Meteor showers occur when Earth passes through streams of cosmic debris, causing many meteors to appear to radiate from the same point in the sky. Impacts from meteorites can form craters on planetary surfaces.

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    Meteors (Group 10 )

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    Meteoroids are small pieces of rock or metal that travel through space. When they enter Earth's atmosphere, they glow brightly from friction and are called meteors. Most burn up in the atmosphere, but some survive as meteorites that reach the ground. Meteorites come in three main types - stony, iron, and stony-iron. Meteor showers occur when Earth passes through streams of cosmic debris, causing many meteors to appear to radiate from the same point in the sky. Impacts from meteorites can form craters on planetary surfaces.

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    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    80 views32 pages

    Meteors (Group 10)

    Uploaded by

    Valerie
    Meteoroids are small pieces of rock or metal that travel through space. When they enter Earth's atmosphere, they glow brightly from friction and are called meteors. Most burn up in the atmosphere, but some survive as meteorites that reach the ground. Meteorites come in three main types - stony, iron, and stony-iron. Meteor showers occur when Earth passes through streams of cosmic debris, causing many meteors to appear to radiate from the same point in the sky. Impacts from meteorites can form craters on planetary surfaces.

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    METEORS, METEOROIDS,

    AND METEORITES
    Have you ever
    seen a falling
    star?
     A meteor appears when a chunk of metallic or
    stony matter called a meteoroid enters the
    Earth's atmosphere from outer space. Air friction
    heats the meteoroid so that it glows. It creates a
    shining trail of gases and melted meteoroid
    particles. Most meteoroids burn up before
    reaching the Earth. Some leave a trail that lasts
    several seconds. Millions of meteors occur in the
    Earth's atmosphere every day. Most meteoroids
    that cause meteors are about the size of a
    pebble.
    WHAT IS A METEOROID?
     A meteoroid is a piece of stone-like or metal-like debris
    which travels in outer space. Most meteoroids are no
    bigger than a pebble. Large meteoroids are believed to
    come from the asteroid belt. Some of the
    smaller meteoroids may have come from the Moon or
    Mars.
     Meteoroids travel around the sun in different orbits and
    at different speeds. The fastest ones move at about 26
    miles per second. The Earth travels at about 18 miles per
    second. So when meteoroids meet the Earth's
    atmosphere head-on, the combined speed may reach
    about 44 miles per second, or 264 miles per hour!
    WHAT IS A METEORITE?

     A meteorite is a fragment of rock or iron from outer


    space, usually a meteoroid or asteroid, which survives
    passage through the atmosphere as a meteor to impact
    the surface of the Earth. Meteorites are believed to
    originate in the asteroid belt between the planets of
    Mars and Jupiter.
     Meteorites reach the Earth's surface because they are
    the right size to travel through the atmosphere. If they
    are too small, they will burn up in the atmosphere. If they
    are too large, they may explode before reaching the
    Earth's surface.
    There are 3 Kinds of Meteorites
    STONY METEORITES
    -Stony meteorite, any meteorite consisting largely of rock-forming (silicate)
    minerals. Stony meteorites, which are the most abundant kind of meteorite, are divided
    into two groups: chondrites and achondrites.
    IRON METEORITES
    -Iron meteorites are meteorites that consist overwhelmingly of an iron–nickel alloy known as
    meteoric iron that usually consists of two mineral phases: kamacite and taenite.
    STONY- IRON METEORITES
    -Stony-iron meteorites or siderolites are meteorites that consist of nearly equal parts of
    meteoric iron and silicates.
    STONY METEORITE
    IRON METEORITE
    STONY- IRON METEORITE
    METEOR SHOWERS

     A meteor shower is a celestial event in which a


    number of meteors are observed to radiate, or
    originate, from one point in the night sky called
    Radiant. These meteors are caused by streams of
    cosmic debris called meteoroids entering Earth's
    atmosphere at extremely high speeds on parallel
    trajectories.
    IMPACT CRATERS

    An impact crater is an approximately circular depression


    in the surface of a planet, moon, or other solid body in
    the Solar System or elsewhere, formed by the
    hypervelocity impact of a smaller body.
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