Teaching Lesson Plan for English (6426 words, 25 pages)
Earthis the thirdplanetfrom theSun, and thedensestand fifth-largest of the eight planets in theSolar System. It is also the largest of the Solar System's fourterrestrial planets. It is sometimes referred to as theworldor the Blue Planet.22Earth formedapproximately 4.54 billion yearsago, andlife appearedon its surface within its first billion years.23Earth'sbiospherethen significantly alteredthe ...
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