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Earth Science MCQs: Multiple Choice Questions and Answers (Quiz & Tests with Answer Keys)
Price: $3.99 USD. Words: 35,060. Language: American English. Published: May 29, 2016 by Bushra Arshad. Categories: Nonfiction » Science and Nature » Earth sciences, Nonfiction » Education and Study Guides » Study guides - Sciences
Earth science MCQs has 662 multiple choice questions. Earth science quiz questions and answers pdf, MCQs on earth planet, geology, geoscience, earth models and maps, physical science, environmental science MCQs with answers, earth crust, earth shape, earth facts, energy resources, minerals, rocks and minerals quiz and MCQs to practice exam prep tests.
Precambrian Age
Price: $3.00 USD. Words: 17,150. Language: English. Published: September 24, 2012 by ALVIS International Editions. Categories: Nonfiction » Science and Nature » Earth sciences, Nonfiction » Science and Nature » Geology
The Precambrian is the oldest era of Earth's history, and, of its origins (4 billion and 500 million years ago), the appearance of the first invertebrates with exoskeletons (542 million years ago). In this long period of time, the planet, newly formed, was affected by cosmic events and geological shocking that border on the limits of imagination.

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