ساختار شکست کار چیست (WBS)

میکاشیست و اسپیکولاریتاسپیکولاریت را می توان به هماتیت سیاه رنگ که میکا دارد لقب داد و میکا شیست هم مشابه اسپیکولاریت هستولی دارای سختی و وزن مخصوص بسیار بالاتر.micaschist and specularite Specularite can be called black hematite that has mica And mica schist is similar to specularite But it has a much higher hardness and specific weight.Meteorites are fragments of rock or metal that fall to Earth from space.They are very rare, but many people find unusual rocks or piecesof metal and wonder if they might have found a meteorite.The USGS doesn't verify meteorites, but they haveseveral properties that help distinguish them from other rocks:Density: Meteorites are usually quite heavy for their size, since they contain metallic iron and dense minerals.Magnetic: Since most meteorites contain metallic iron, a magnet will oftenstick to them. For “stony” meteorites, a magnet might not stick,but if you hang the magnet by a string, it will be attracted.Unusual shape: iron-nickel meteorites are rarely rounded. Instead,they have an irregular shape withunusual pits like finger prints in their surface called “regmaglypts.”Fusion crust: stony meteorites typically have a thin crust on theirsurface where it melted as it passed through the atmosphere.Meteorites do NOT have the following:Light-colored crystals: Quartz is a common, light-colored crystal inEarth’s crust, but it is not found on other bodies in the solar system.Bubbles: volcanic rocks or metallic slag onEarth often have bubbles o, ...ادامه مطلب