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. |
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النتائج 1-3 من 12
الصفحة 32
... million years ago . Even the Moon , with a diameter of nearly 2,200 miles , was " dead " by about 2,900 million years ago . How then can the eight meteorites be igneous rocks only 1,300 to 200 million years old ? It is possible that the ...
... million years ago . Even the Moon , with a diameter of nearly 2,200 miles , was " dead " by about 2,900 million years ago . How then can the eight meteorites be igneous rocks only 1,300 to 200 million years old ? It is possible that the ...
الصفحة 55
... million years ago . Our atmosphere and oceans may have been produced by the degassing of cometary or " wet " asteroidal projectiles that landed on Earth towards the end of the bombardment . Afterwards , the Earth entered a period of ...
... million years ago . Our atmosphere and oceans may have been produced by the degassing of cometary or " wet " asteroidal projectiles that landed on Earth towards the end of the bombardment . Afterwards , the Earth entered a period of ...
الصفحة 57
... million years reptiles dominated the Mesozoic Era ( Fig . 63 ) . Then dinosaurs , pleisiosaurs and ichthyosaurs ... ago , at the end of the Cretaceous period and before the Paleocene , the beginning of the Tertiary era . This extinction ...
... million years reptiles dominated the Mesozoic Era ( Fig . 63 ) . Then dinosaurs , pleisiosaurs and ichthyosaurs ... ago , at the end of the Cretaceous period and before the Paleocene , the beginning of the Tertiary era . This extinction ...
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