A Beka Science (Forces of the earth) 2
Terms
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- Weathering
- To expose to the open air : subject to the action of the elements.
- Bedrock
- The solid rock underlying unconsolidated surface materials.
- Rotation
- The action or process of rotating on or as if on an axis or center (2) : the act or an instance of rotating something b : one complete turn : the angular displacement required to return a rotating body or figure to its original orientation.
- Revolution
- The action by a celestial body of going round in an orbit or elliptical course; also : apparent movement of such a body round the earth.
- Precession
- A comparatively slow gyration of the rotation axis of a spinning body about another line intersecting it so as to describe a cone .
- Magnetism
- A class of physical phenomena that include the attraction for iron observed in lodestone and a magnet , are inseparably associated with moving electricity, are exhibited by both magnets and electric currents, and are characterized by fields of force.
- Gauss
- The centimeter-gram-second unit of magnetic flux density that is equal to 1 x 10-4 tesla.
- Magnetic Sphere
- A region of space surrounding a celestial object (as a planet or star) that is dominated by the object's magnetic field so that charged particles are trapped in it.
- Auroras
- A luminous phenomenon that consists of streamers or arches of light appearing in the upper atmosphere of a planet's magnetic polar regions and is caused by the emission of light from atoms excited by electrons accelerated along the planet's magnetic field lines.
- Igneous
- Relating to, resulting from, or suggestive of the intrusion or extrusion of magma or volcanic activity.
- Extrusive
- Relating to or formed by geological extrusion from the earth in a molten state or as volcanic ash.
- Intrusive
- Of a rock : having been forced while in a plastic state into cavities or between layers.