Flashcards
Earth Structure Definitions
Cards in this deck (18)
- 1Define the Solar Systemis the Sun, planets, their moons, comets and asteroids
- 2Define the Suna star composed of hydrogen and helium. It is the largest object in the Solar Sysem and contains more then 99.8% of the total mass
- 3Define a planeta sizable object orbiting the sun
- 4Define moona natural satellite orbiting a planet
- 5Define asteroidsrocky objects which failed to form a planet
- 6Define meteoritesfragments of rock which fall to Earth from space
- 7Define a cometcomposed of ice and dust. The outer layer melts into water vapour as it gets closer to the Sun.
- 8Define rheida solid material that flows
- 9Define peridotitean ultramafic igneous rock composed of the minerals olivine and pyroxene with a coarse crystal size
- 10Define olivinea dense, ferromagnesian silicate mineral
- 11Define partial meltingwhere a proportion of the minerals will have a lower melting point, allowing them to melt while the rest remains solid
- 12Define kimberlitesfine-grained, ultramafic igneous rocks
- 13Define xenolithfragment of foreign rock included in an igenous rock which has come from a different source
- 14Define ophiolitea section of oceanic crust and upper mantle broken off and attached to the edge of a continent during plate movement
- 15Define palaeomagnetismancient magnetism preserved in rocks
- 16Define magnetic anomalya value for the Earth's magnetic field, which is different from the expected value
- 17Define magnetic inclinationis the angle of dip of the lines of a magnetic field. It is the angle with the horizontal made by a compass needle.
- 18Define remnant magnetismmagnetism shown by rocks due to the alignment of their magnetic minerals according to the Earth's magnetic field at the time of their formation
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- Undergraduate Geology - Part 1 (Earth Structure) Flashcards on Earth Structure Definitions, created by siobhan.quirk on 08/05/2013.
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