BC: i would like to dedicate this book to Abdulaziz Al Baghli & Abdulhameed Al Buaijan
FC: PROTEROZOIC | By: Sabah Al Sabah
1: Table of contents Prokaryote Cells pg.4 Animal pg.6 Climate pg.8 Time & Subdivision pg.10 Plants pg.12 Bibliography pg.15 | My topic is about the Proterizoic Eon
2: The Proterozoic includes over half the history of life on this planet. By 2.5 billion years ago, when the Achaean Eon ended and the Proterozoic Eon began. The name Proterozoic comes from Greek and means "earlier life" or "time of ancient life"
4: Prokaryote Cells One of the most important events of the Proterozoic was the gathering up of oxygen in the Earth's atmosphere. At that time trillions of prokaryote cells lived in Earth's oceans. Some of these cells could photosynthesize their energy from sunlight, water, and carbon dioxide. These photosynthesizing cells pooped out a lot of oxygen.
6: Animal In the long term, the most successful animal group of the Proterozoic were the sponges . The environment remain are from a shallow marine .Well preserved fossils have been describe
8: Climate The climate of Proterozoic could be cold in thebeginning, and then the earth started to warm up. Thereason for this is because there is not enough evidence todetermine what life was like 4.6 billion years ago.
10: Time & Subdivision Proterozoic is subdivided into three eras which are : 1. Paleoproterozoic (2.5 to 1.6 billion years ago) 2. Mesoproterozoic (1.6 to 1 billion years ago) 3. Neoproterozoic (1 billion to 542.0 million yearsago)
12: Plant Early plants, developed into a new type of cell as they had created. This cell was the eukaryote, a cell that contains a nucleus. the living organisms were able to join together into groups of eukaryotic cells.
14: The end of the Proterozoic, about 542 million years ago, is roughly the time when the first worms andarthropods Arthropods are insects like beetles appear onEarth. The period after the Proterozoic is the CambrianEra.
15: BIBLIOGRAPHY: 1. Carr, Dr. Karen. "Proterozoic Eon - Science forKids!" Kidipede - Science for Kids - HomeworkHelp for Middle School. Portland StateUniversity, 23 Nov. 2012. Web. 17 Feb. 2013.