There are approximately 4000 different minerals and each of those minerals has a unique set of physical properties. These include: color, streak, hardness<span>, </span>luster<span>, diaphaneity, specific gravity, </span>cleavage<span>, fracture, </span>magnetism<span>, </span>solubility<span> and many more. These physical properties are useful for identifying minerals.
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These changes in air pressure and wind speed cause<span> warm surface water to move eastward along the Equator, from the western Pacific to the coast of northern </span>South America<span>. </span>
Mountainous and Meadow Regions is not one of Guyana's natural regions.
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