Videos A to Z

  • Magnets and Electromagnetism: Magnetic field II

    • 3-5

    Magnets are surrounded by an invisible force, called a magnetic field, which exerts a force on magnetic materials near it.  » more info

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  • Magnets and Electromagnetism: Magnetosphere II

    • 3-5

    The magnetosphere is the region around Earth where magnetic fields are located.  » more info

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  • Magnets and Electromagnetism: Solar wind II

    • 3-5

    The magnetosphere protects Earth from the continual flow of charged particles from the sun, referred to as solar wind.  » more info

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  • Mapping: Conic projection I

    • 3-5
    • 6-8
    • 9-12

    Conic projections are made by projecting a portion of a map onto a cone. Most road and weather maps are conic projections.  » more info

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  • Mapping: Latitude

    • 3-5
    • 6-8
    • 9-12

    Lines of latitude run parallel to the equator, which is at zero degrees latitude. The north pole is 90 degrees north latitude and the south pole is 90 degrees south latitude.  » more info

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  • Mapping: Latitude and longitude grid

    • 3-5
    • 6-8
    • 9-12

    The grid pattern formed by intersecting lines of latitude and longitude enable exact locations on Earth's surface to be pinpointed.  » more info

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  • Mapping: Longitude

    • 3-5
    • 6-8
    • 9-12

    Imaginary lines that run from pole to pole are called meridians, or lines of longitude. The Prime Meridian, which passes through Greenwich, England, is zero degrees latitude. Locations west of the prime…  » more info

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  • Mapping: Mercator projection

    • 3-5
    • 6-8
    • 9-12

    One of the most common projections of Earth is the Mercator projection which is very useful in navigation. One drawback is that land masses near the poles appear distorted.  » more info

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  • Mapping: Night and day

    • 3-5
    • 6-8
    • 9-12

    The Earth makes one full rotation everyday. When the half facing the sun is lit (day), the other half is dark (night).  » more info

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  • Mapping: Time Zones

    • 3-5
    • 6-8
    • 9-12

    A time zone is a belt of longitude (approx. 15 degrees wide) in which all areas have the same time. There are 24 times zones.  » more info

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