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These three short online lessons discuss asteroids, comets and meteors.
These three short online lessons discuss asteroids, comets and meteors.
This online resource discusses the distribution of earth's water.
The Earth behaves like a giant bar magnet and as such there is a magnetic field present around it. The Earth’s magnetic field is thought to be caused by flowing liquid metals in the outer core of the planet which causes electric currents and a magnetic field.
These two short online tutorials discuss how the earth rotates and then the earth's revolutions.
In the first URL, the YouTube video explains why earth has spring, summer, autumn and winter seasons. The second URL summarizes the key takeaway points.
This online tutorial will explain the earth's shape and its hemispheres.
The idea of the electric field, how it's useful, and explains how the electric field is defined.
This YouTube video explains how to calculate an irregular area on a map.
This YouTube video explains how to calculate a regular area on a map.
This online article delves into our the sun and planets were formed.