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Midterm Study Guide2013
Midterm Study Guide2013

... 30. What are the three main types of plate boundaries? 31. Explain why divergent plate boundaries are also called constructive plate margins. 32. What features are common at convergent continental-continental boundaries? Give an example. 33. Describe what happens at transform fault boundaries, and i ...
ALFRED WEGENER THEORY OF CONTINENTAL DRIFT
ALFRED WEGENER THEORY OF CONTINENTAL DRIFT

... • Seismic waves produced by earthquakes travel at different speeds through solid rock and liquids ...
6th Grade Science
6th Grade Science

... 41. Fluids are materials that can ________ . 42. Fluids are most often ________ and _________ , but can also be some solids. 43. ___________ is heat transfer through empty space. 44. Radiation transfers energy through ________ . 45. Heat transfer by radiation occurs ____________ direct contact or mo ...
The Layers of the Earth
The Layers of the Earth

... •Define crust. •Describe a time when you interacted with the Earth’s crust. •What are the main elements that make up the Earth’s crust? •Describe the thickness of the crust. •What are the two types of crust? What are they mainly composed (made) of? •Color the crust Green. On the Mantle section answe ...
Earth`s Crust in Motion
Earth`s Crust in Motion

... 30. What causes the convection cell to turn to the left at point B? The convection cell turns to the left at Point B because the rising material hits the lithosphere and cannot go up any more. 31. What happens to the temperature and density of the material between points B and C? The material contin ...
What is a Rock?
What is a Rock?

... • These layers are made up of progressively denser material toward the center of the Earth. ...
Tour of Plate Boundaries
Tour of Plate Boundaries

... explore these Tectonic Landscapes and put into “realworld” context what we have learned in class. ...
Chapter 21 - Bemidji State University
Chapter 21 - Bemidji State University

... d. Trac..s<.fossils - imprint by a moving animal including footprints, burrowing and etc. II. Relative Geological Time - Geological events are recorded in the rocks and are placed in chronological order without regard for the actual dates. A. Superposition - in a sequence of undisturbed sedimentary ...
SOL_5.7_Earth
SOL_5.7_Earth

... and by heat and pressure below the surface. Weathering is the breaking down of rocks and other materials into smaller particles. Air, water, and temperature changes cause rocks to break into smaller pieces resulting in physical change. Dissolved gasses in air and water react with minerals in some ro ...
Shrinking mountains (Rocks of the Earth)
Shrinking mountains (Rocks of the Earth)

... Termed the Goldilocks Planet because of its ideal distance from the sun, which allows the planet to have liquid water on its surface, the Earth is also the perfect size to have maintained plate tectonics over the past 4,600 million years. Mars was likely too small to develop plate tectonics in its e ...
Geology-Sheet-3-Carboniferous-Period
Geology-Sheet-3-Carboniferous-Period

... different during the first part of the Carboniferous period. It was warmer and more humid, and there were no distinct seasons. Average global temperature was 20°C in the early Carboniferous - it is only about 12°C today. Later during the Carboniferous, global temperatures cooled to levels similar to ...
Earth`s Changing Crust
Earth`s Changing Crust

... (DEPOSITION) • Deposition takes place when glaciers melt and wind stops blowing. • Layer by layer, pile after pile, bits and pieces of rock deposited by the water, wind, and ice build up on Earth’s surface. • Deposition eventually fills up depressions in the Earth’s surface. It can build up land alo ...
Plate Tectonics Powerpoint by M.A. Garcia
Plate Tectonics Powerpoint by M.A. Garcia

... Perhaps all these pieces used to be connected. ...
Direct Interactive Instruction Demonstration Lesson Information
Direct Interactive Instruction Demonstration Lesson Information

... systems, whereby geoscience factors control the evolution of life, which in turn continuously alters Earth’s surface. Examples of include how photosynthetic life altered the atmosphere through the production of oxygen, which in turn increased weathering rates and allowed for the evolution of animal ...
Ch 8 Archean
Ch 8 Archean

...  Comparatively simple organic (carbon based) molecules known as microspheres  form spontaneously  show greater organizational complexity than inorganic objects such as rocks  can even grow and divide in a somewhat organism-like fashion ...
Plate Tectonics - LunsfordEnvironmentalScience
Plate Tectonics - LunsfordEnvironmentalScience

...  Why didn’t scientists support his theory? What further evidence could have strengthened his theory? ...
Continental drift
Continental drift

... caused Pangaea to break apart • Continental drift is a theory that explained how continents shift position on Earth's surface. • Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also explained why look-alike animal and plant fossils, and similar rock formation ...
earthquake shearing deformation compression fault plateau focus
earthquake shearing deformation compression fault plateau focus

The diagram below shows the latitude and longitude for a city in
The diagram below shows the latitude and longitude for a city in

... Iron inside the Earth makes Earth a ________________ _____________ . When hot magma __________ __________ , the bits of iron in the ________________ will point to the poles like a compass needle. 9. Paleomagnetism = ______________ __________________ __________________ . _______________ in new crust ...
The Theory of Continental Drift
The Theory of Continental Drift

... in time. Ice core samples can give scientists an idea of how the atmosphere has changed by analyzing the substances found in the core samples. Was there a period of great volcanic activity across the Earth? Was there a period of time when our air was not so oxygen-rich? So…WHEN I SAY ICE CORES, YOU ...
Unit 1
Unit 1

... 8. The problem of the age of the earth and the universe is still being discussed by scientists. 9. Spectroscopic studies of the sun have been made over many years and many data have been accumulated. 10. For those who live on the equator, days and nights will always be equal. 11. The known history o ...
Earth Science, 12e (Tarbuck/Lutgens)
Earth Science, 12e (Tarbuck/Lutgens)

... 67) From the land surface downward to the unweathered bedrock, which of the following is the correct order of the different soil horizons? A) 0, A, E, B, C, bedrock B) A, B, C, D, E, bedrock C) E, A, B, C, 0, bedrock D) D, E, C, B, A, bedrock ...
Earthquakes
Earthquakes

... Discovering Earth’s major layers • Inner core • Discovered in 1936 by noting a new region of seismic reflection within the core • Size was calculated in the 1960s using echoes from seismic waves generated during underground nuclear tests ...
Volcanoes and Igneous Activity Earth
Volcanoes and Igneous Activity Earth

... Discovering Earth’s major layers • Inner core • Discovered in 1936 by noting a new region of seismic reflection within the core • Size was calculated in the 1960s using echoes from seismic waves generated during underground nuclear tests ...
Semester Exam
Semester Exam

... 74. Throughout the rock cycle many processes take place (e.g. weathering, sedimentation, melting). What happens to the total amount of material? ...
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Age of the Earth



The age of the Earth is 4.54 ± 0.05 billion years (4.54 × 109 years ± 1%). This age is based on evidence from radiometric age dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.Following the development of radiometric age dating in the early 20th century, measurements of lead in uranium-rich minerals showed that some were in excess of a billion years old.The oldest such minerals analyzed to date—small crystals of zircon from the Jack Hills of Western Australia—are at least 4.404 billion years old. Comparing the mass and luminosity of the Sun to those of other stars, it appears that the Solar System cannot be much older than those rocks. Calcium-aluminium-rich inclusions – the oldest known solid constituents within meteorites that are formed within the Solar System – are 4.567 billion years old, giving an age for the solar system and an upper limit for the age of Earth.It is hypothesised that the accretion of Earth began soon after the formation of the calcium-aluminium-rich inclusions and the meteorites. Because the exact amount of time this accretion process took is not yet known, and the predictions from different accretion models range from a few millions up to about 100 million years, the exact age of Earth is difficult to determine. It is also difficult to determine the exact age of the oldest rocks on Earth, exposed at the surface, as they are aggregates of minerals of possibly different ages.
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