'Major mass extinctions' presentation slideshows

The history of life on earth

The history of life on earth . Conditions on early Earth made the Origin of Life possible. Current theory about how life on Earth began. Earth formed about 4.6 billion years ago. Earth was too hot and still being bombarded by meteors, any water evaporated.

769 views • 33 slides

Speciation and Extinction

473 views • 27 slides

Quiz/Review

Quiz/Review. Get out a small piece of paper and put your name on it. When the bell rings, the quiz will begin. Question 1. How many major mass extinctions have there been?. Question 2. How many species were alive that are now extinct?. Question 3. What could cause a mass extinction?.

301 views • 18 slides

Origins of Life on Earth

Origins of Life on Earth. Oldest Fossils. Evidence shows Earth is 4.6 billion years old. Earth cooled and solidified 4.2 billion years ago. The oldest fossils indicating life are 3.5 billion years old.

302 views • 17 slides

chemische Evolution

652 views • 16 slides

Abiotic production of biomolecules

414 views • 15 slides

Quiz/Review

Quiz/Review. Get out a small piece of paper and put your name on it. When the bell rings, the quiz will begin. Question 1. When did the last major eruption of Mt. St. Helens occur?. Question 2. What killed most people in the major eruption of St Helens. Question 3.

324 views • 15 slides

Quiz/Review

Quiz/Review. Get out a small piece of paper and put your name on it. When the bell rings, the quiz will begin. Question 1. What are mass movements?. Question 2. Name 2 types of mass movements. Question 3. What is one major cause of a landslide?. Answers.

262 views • 12 slides