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Natural Selection and Evolution

Natural Selection and Evolution

Natural Selection and Evolution. Spring 2007 Dobson High School Hope Finzer. Earth’s History. Earth Origins:

By yoko
(261 views)

The History of Life on Earth

The History of Life on Earth

The History of Life on Earth. As We Know It. The History of Earth. Earth is ~ 4.5 billion years old Earth’s history is divided into four eons Hadean Eon: (Gk: Hades - the netherworld) Archean Eon: (Gk: Arche - ancient) Proterozoic Eon: (Gk: Protero - former)

By metea
(292 views)

Chapter 10 Biodiversity

Chapter 10 Biodiversity

Chapter 10 Biodiversity. Remember to write the slides that show the clipboard symbol. Examples written in italics do not need to be written down. We will just discuss them, along with the other slides. Standards. SCSh2a-c SCSh3c, e SCSh4a SCSh6a SEV3a, b, d. Objectives.

By lorene
(95 views)

Prestige Worldwide Travel Agency presents Time Travel

Prestige Worldwide Travel Agency presents Time Travel

Prestige Worldwide Travel Agency presents Time Travel. By Heather MacNeill & Joe McKinnon. Table of Contents. Hadean Era. During this period of time the oceans were replaced with liquid rock and molten lava! There’s always volcanoes blasting off and never ending asteroid impacts!.

By duane
(260 views)

Ch 17 The History of Life

Ch 17 The History of Life

Ch 17 The History of Life . Ch 17.1 – The Fossil Record. Paleontologists- scientists who study fossils Fossil record P rovides evidence about the history of life Shows how different groups of organisms have changed over time

By winda
(110 views)


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Mass Extinctions

Mass Extinctions

Mass Extinctions. 1. What’s a mass extinction?. A sharp decrease in the number of species in a relatively short period of time . There different ways a mass extinction can occur including… Meteors Comets Global warming Ice age And more…. 2. The Ordovician-Silurian Extinction.

By debra-sutton (181 views)

Mass Extinctions

Mass Extinctions

Mass Extinctions. Evidence for Many Events over Geological History. Potential Triggers. Asteroid Impacts = sudden. Large Basalt Outflows. Large CO 2 changes which can affect atmospheric and ocean chemistry (slow). Periodic Comet Strikes.

By sitara (86 views)

Mass Extinctions

Mass Extinctions

Mass Extinctions. Tim Bradshaw December 7, 2005. Extinction. “ceasing of existence of a species or group of taxa” Classic cause: failure to adapt to changes in environment How do you define a species?. Defining species.

By omar-scott (75 views)

Macro-evolutie: MASS EXTINCTIONS

Macro-evolutie: MASS EXTINCTIONS

Macro-evolutie: MASS EXTINCTIONS. Mass extinctions. Diversification and extinctions in the History of Life (1995) M.J. Benton How to kill almost all life: the end-Permian extinction event (2003) M.J. Benton & R.J. Twitchett

By nathan-mueller (109 views)

Lecture 29 : Mass Extinctions

Lecture 29 : Mass Extinctions

Lecture 29 : Mass Extinctions. X. X. X. X. X. X. X. X. Phanerozoic Mass Extinctions. Mississippian. Pennsylvanian. Jurassic. biodiversity. Cambrian. Ma. Apparent percentage of marine animals going extinct. O. C. P. T. D. J.

By nedra (153 views)

Hotspots, Plumes and Mass Extinctions

Hotspots, Plumes and Mass Extinctions

Hotspots, Plumes and Mass Extinctions. Is Hawaii more than a great vacation spot? How does life respond to geologic catastrophes?. Plate Tectonics - Distribution of Volcanic and Earthquake Activity. The Earth’s surface is broken into plates. 1. Wilson Cycle (ocean basin fm). 2. Examples:

By larrylkennedy (0 views)

Hotspots, Plumes and Mass Extinctions

Hotspots, Plumes and Mass Extinctions

Hotspots, Plumes and Mass Extinctions. Is Hawaii more than a great vacation spot? How does life respond to geologic catastrophes?. Plate Tectonics - Distribution of Volcanic and Earthquake Activity. The Earth’s surface is broken into plates. 1. Wilson Cycle (ocean basin fm). 2. Examples:

By jory (169 views)

Evidence for Impact Generated Mass Extinctions

Evidence for Impact Generated Mass Extinctions

Evidence for Impact Generated Mass Extinctions. The Cratering Record. The Moon. Impact Craters on the Earth. From Grieve 1993. Barringer “Meteor” Crater, Arizona. Impact History of the Earth and Moon. Sleep et al., Nature 342 139 (1989).

By bengels (0 views)

Evidence for Impact Generated Mass Extinctions

Evidence for Impact Generated Mass Extinctions

Evidence for Impact Generated Mass Extinctions. The Cratering Record. The Moon. Impact Craters on the Earth. From Grieve 1993. Barringer “Meteor” Crater, Arizona. Impact History of the Earth and Moon. Sleep et al., Nature 342 139 (1989).

By romaine (120 views)

Extinctions

Extinctions

Extinctions. Estimates of Organisms. Fossil records from the Precambrian period estimate the total number of species on Earth to be 500 million The current numbers of known species is between 1.5 – 2 million Current estimates of total species ranges between 10 – 100 million.

By destiny-hurst (96 views)