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The Theory of Continental Drift
The Theory of Continental Drift

... • Convection currents are thought to be the driving mechanism of plate movements. • Convection: the transfer of thermal energy by the movement of heated matter. – Convection currents in the asthenosphere are set in motion by the transfer of energy b/w Earth’s hot interior and its cooler exterior. ...
Unit 4-Dynamic Crust PowerPoint
Unit 4-Dynamic Crust PowerPoint

... -Since these waves travel at different ________ types of ___________ materials, we can use earthquake waves to tell us about the __________________________. interior of the Earth. P-waves -When an earthquake occurs, both __________ and _________________. S-waves are given off In many places on Earth ...
Biology 2015 – Evolution and Diversity
Biology 2015 – Evolution and Diversity

... placed as amoebozoans in the super-group Unikonta, and they are both pretty strange kinds of organisms. As the name Mycetozoa suggests, it was once thought that these organisms were allied with fungi. Cellular slime molds can exist as single-celled feeding amoeba, aggregates of amoebae that can migr ...
View Outline
View Outline

... will be based on the average of all exams. B. Has failing average in all 4 exams. III. After taking the final examination and the student still failed, a grade of 4.0 or 5.0 will be appropriately given if the final average is below 50. IV. A student who fails to take two (2) long exams, shall automa ...
rev-sheet-answered-English Social
rev-sheet-answered-English Social

... together and interact within their natural habitat. 2. All living organisms within an ecosystem stay alive through a process known as A FOOD CHAIN 3. THE FOREST FLOOR is humid and dark, because the higher layers block out the sunlight from reaching the ground. 4. The grass gets eaten by animals such ...
Chapter 22.
Chapter 22.

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Continental Drift
Continental Drift

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Continental Drift

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continental-drift
continental-drift

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B1 Revision Mind Maps

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The Wizard Test Maker
The Wizard Test Maker

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PART 1 vocab quiz

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A Game of X`s and O`s
A Game of X`s and O`s

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B3 C3 P3 REVISION QUIZ!

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evolution test review slides - Sandora Biology
evolution test review slides - Sandora Biology

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1 The weather on Earth suddenly changes and temperatures in the

... concentration of 0.5%. The results are in figure II. The fleas in Group C are treated with higher and higher concentrations of pesticide during each successive generation of offspring. After a year, the fleas are completely resistant to the pesticide, regardless of its concentration. The fleas are t ...
Continental-Drift-and-Seafloor-Spreading
Continental-Drift-and-Seafloor-Spreading

... 3. Glossopteris- plant fossils found on different continents- Plant fossils 4. Tropical plant fossils that were found on an island in Artic Ocean! (Scratches in rocks made by glaciers in South Africa) The continental drift theory was NOT accepted because Wegener could not explain HOW the continents ...
Curriculum Map and Pacing Guide – Earth Systems
Curriculum Map and Pacing Guide – Earth Systems

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Punnett Square Worksheet 1
Punnett Square Worksheet 1

... they eat more and more of the herbivores, decreasing the herbivore population. It then becomes harder and harder for the carnivores to find herbivores to eat, and the population of carnivores decreases. In this way, the carnivores and herbivores stay in a relatively stable equilibrium, each limiting ...
Chapter 22 Guided Reading Notes and the MUST
Chapter 22 Guided Reading Notes and the MUST

... 4. Explain how fossils are dated by radiometric dating and analyzing the half-life of isotopes. 5. Know that fossils provide are a great representation of how groups of organisms change over time. Concept 25.3: Key events in life’s history include the origins of single celled and multi-celled organi ...
Answers to pgs. 125 - 128 wks.
Answers to pgs. 125 - 128 wks.

... 17. How does finding Mesosaurus fossils in South America and southwestern Africa show that the continents of South America and Africa were joined? There was one large population of Mesosaurus walking and dying on Pangaea then when South America and Africa broke away and moved from Pangaea, these two ...
Biology SH - Willmar Public Schools
Biology SH - Willmar Public Schools

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Earth History 870:035
Earth History 870:035

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Study Guide: Evolution and Classification
Study Guide: Evolution and Classification

... 48. Many organisms possess structures that have no apparent function, but they resemble structures of presumed ancestors. This is the study of A) the fossil record B) the molecular record C) homology D) development E) vestigial structures 49. The observation that different geographical areas sometim ...
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Evolutionary history of life



The evolutionary history of life on Earth traces the processes by which living and fossil organisms have evolved since life appeared on the planet, until the present day. Earth formed about 4.5 Ga (billion years ago) and life appeared on its surface within 1 billion years. The similarities between all present-day organisms indicate the presence of a common ancestor from which all known species have diverged through the process of evolution. More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.
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