Slide 1Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu To View the presentation as a slideshow with effects select View on the menu…

1. HistoryofLifeonEarth 2. It Started with the Sun From a ball of swirling gasa centre point emerged.This centre mass became the Sun. 99.8% of the entire mass of our solar…

Slide 1 History of Life on Earth Chapter 12 Slide 2 HOW DID LIFE BEGIN? Section 12-1 Slide 3 The Early Earth was Lifeless When Earth formed about 4.3 billion years ago, it…

Slide 1 History of Life on Earth Slide 2 Objectives Summarize how radioisotopes can be used to determine the age of the earth Compare two models that describe how the chemicals…

Hosted by Zach 100 100 200 200 400 400 300 400 D.1 D.2 D.3 D.5 300 300 300 200 400 200 100 500 500 500 500 100 Row 1, Col 1 non-living synthesis of simple organic molecules…

Prokaryotes Ch. 19 Prokaryotes Ch. 16 Origin of Life No one knows for sure how the first organisms arose There are three possibilities for the origin of life extraterrestrial…