MeteoritesSterling Pub., 1993 - 60 من الصفحات "A wonderful resource....Students will be drawn to read and investigate....The text is direct, interesting, and free of mind-numbing chemistry and physics formulas that so often deter YAs from further investigation....An exceptionally well-done summary."-- "SLJ . "Well-written and nicely illustrated....The technical quality of the book is very good...."-- "Science Bks & Films, a starred review . 60 pages (all in color), 8 1/4 x 7 7/8. |
من داخل الكتاب
النتائج 1-3 من 9
الصفحة 14
... determine the orbits of the meteoroids when they encountered the Earth . This requires knowledge of the direction ... determined precisely from photographs . The orbits are elliptical and extend beyond the orbit of Mars , but not as far ...
... determine the orbits of the meteoroids when they encountered the Earth . This requires knowledge of the direction ... determined precisely from photographs . The orbits are elliptical and extend beyond the orbit of Mars , but not as far ...
الصفحة 42
... determine formation ages is as follows : Use is made of radioactive " clocks " such as the natural decay of uranium to form lead , which occurs at a known rate . We use samples from either a number of related meteorites or the separated ...
... determine formation ages is as follows : Use is made of radioactive " clocks " such as the natural decay of uranium to form lead , which occurs at a known rate . We use samples from either a number of related meteorites or the separated ...
الصفحة 58
... determined for meteorites before they were known for Earth rocks . The primordial objects from space , known as ... determine the effects upon it of radiation in space . Perhaps the most difficult challenge , however , will be to ...
... determined for meteorites before they were known for Earth rocks . The primordial objects from space , known as ... determine the effects upon it of radiation in space . Perhaps the most difficult challenge , however , will be to ...
المحتوى
Introduction | 1 |
How do meteorites get here? | 8 |
Where do meteorites come from? | 14 |
حقوق النشر | |
3 من الأقسام الأخرى غير ظاهرة
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
anorthosite Antarctica Apollo astroblemes atmospheric flight basaltic basaltic achondrites basaltic rock blue ice bombardment bright fireball calcium carbonaceous chondrite caused chemical elements chondrites contain chondrules cometary composed cooled core Cosmic spherules crater crystals dark decay feldspar fell formation age fragments fusion crust gravity group IIAB Halley's Comet highlands howardites igneous rocks inches indicates interplanetary dust interstellar cloud iridium iron meteorites iron-nickel metal land on Earth liquid lunar magnesium mare Mars melting mesosiderites Meteor meteorite falls meteorite impact meteorite landed meteorite shower meteoroid micrometeorites million years ago mineral grains molten Moon nebula objects observed occurred olivine orbit palladium Pallasites parent asteroid particles percent nickel planetary planets formed plutonium produced pyroxene radioactive aluminum samples silicate SNC meteorites Solar System solar wind solidified sonic booms space speed stars stone stony material stony meteorite stony minerals Stony-iron meteorite sulfide Sun and planets supernova surface temperature Widmanstätten pattern