This thin crust is called a fusion crust. When a meteorite falls through the Earth's atmosphere a very thin layer on the outer surface melts. Meteorites which have fallen recently may have a black "ash-like" crust on their surface. Since detailed analyses take time and money, look for the easy characteristics first.
Sometimes, detailed chemical analyses need to be done, but only on rocks that meet all these characteristics. Usually, meteorites have all or most of these characteristics. You can use this list to guide you through them. Meteorites have several distinguishing characteristics that make them different from terrestrial (Earth) rocks. Several booms may be succeeded by irregular sputtering sounds, comparable to an automobile backfiring. Because the fireballs are traveling at high speeds, they sometimes produce a sonic boom or whistling heard 30 miles or more from where the meteorite lands. A smoke or dust trail is produced in the sky by the fireball caused by the removal of material from the surface of the meteorite. When a meteor enters the Earth's atmosphere the resulting fireball produces light, due to the friction between its surface and the air. Meteorites fall to Earth all the time and are distributed over the entire planet, so you could even find one in your own backyard! They are rocks that are similar in many ways to Earth rocks, but it is exciting to find a piece of another planet here on Earth. Meteorites are pieces of asteroids and other bodies like the moon and Mars that travel through space and fall to the earth. Do You Think You May Have Found a Meteorite?
0 kommentar(er)
