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Crystallography
https://australianmuseum.net.au/learn/minerals/what-are-minerals/crystallography/Minerals can be identified by the shape of their crystals: called crystallography. External crystallography measures the outside properties of crystals such as length of crystal surfaces and the angles between these surfaces.
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The universe
https://australianmuseum.net.au/learn/minerals/shaping-earth/the-universe/The universe can be defined as the whole of existing things from the scale of sub-micron to outer space.
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Lavas
https://australianmuseum.net.au/learn/minerals/shaping-earth/lavas/One of the products of volcanic eruptions is lava. Lavas vary widely in composition depending upon their original source magma.
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Plate Tectonics
https://australianmuseum.net.au/learn/minerals/shaping-earth/plate-tectonic-processes/Since the 1950s, several discoveries have led to a new understanding of how the Earth works.
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Igneous rock types
https://australianmuseum.net.au/learn/minerals/shaping-earth/igneous-rock-types/Igneous rocks can be divided up into four groups, based on how they were formed and what they are made of.
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Looking inside the Earth
https://australianmuseum.net.au/learn/minerals/shaping-earth/looking-inside-the-earth/The internal structure of the Earth consists of three main parts, the crust, mantle and core. The division between the crust and the mantle is called the Moho.
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Structure of volcanoes
https://australianmuseum.net.au/learn/minerals/shaping-earth/structure-of-volcanoes/Although volcanoes are often seen as being destructive they are also constructive. They add more land to the surface of the Earth and, when weathered, provide us with a nutrient-rich soil for agriculture.
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Sedimentary processes
https://australianmuseum.net.au/learn/minerals/shaping-earth/sedimentary-processes/Sediments are formed by the breakdown (both physical and chemical) of pre-existing rocks, which may be of igneous, metamorphic or sedimentary origin.
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Sedimentary structures
https://australianmuseum.net.au/learn/minerals/shaping-earth/sedimentary-structures/Sedimentary structures can be of either physical (e.g. wave action) or biological (e.g. disruption of sediments by animals) origin.
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Limestone caves
https://australianmuseum.net.au/learn/minerals/shaping-earth/limestone-caves/Caves form in limestone (calcium carbonate), and occasionally in dolomite (calcium magnesium carbonate), when water containing dissolved carbon dioxide (carbonic acid) seeps into rock crevices and joints.