Plate Tectonics - Crafton Hills College
... 6) Polar Wandering: ancient poles were in different positions than the present poles. This can only be explained by: 1) Continents remained still and the poles moved 2) Poles were still and the continents moved (Reality: they both move) Wagener’s theory was not accepted. Why? ...
... 6) Polar Wandering: ancient poles were in different positions than the present poles. This can only be explained by: 1) Continents remained still and the poles moved 2) Poles were still and the continents moved (Reality: they both move) Wagener’s theory was not accepted. Why? ...
Unit 1: Rocks and Minerals
... Earth is made of layers known as the crust, mantle, and core. The crust is the outermost layer—Earth’s surface (including that underneath the oceans). The layer below the crust is the mantle. Below the mantle is Earth’s core, which has two parts: the outer core and the inner core. The temperature an ...
... Earth is made of layers known as the crust, mantle, and core. The crust is the outermost layer—Earth’s surface (including that underneath the oceans). The layer below the crust is the mantle. Below the mantle is Earth’s core, which has two parts: the outer core and the inner core. The temperature an ...
Why does Earth`s crust move? The mystery of the moving crust has
... A further clue came from fossils of trilobites found high up on the Himalayan Mountains in India. These trilobites roamed the ancient seas 250 to 500 million years ago. How did trilobites end up on the "roof" of the world? The evidence suggested that India was once a separate piece of land. Many mil ...
... A further clue came from fossils of trilobites found high up on the Himalayan Mountains in India. These trilobites roamed the ancient seas 250 to 500 million years ago. How did trilobites end up on the "roof" of the world? The evidence suggested that India was once a separate piece of land. Many mil ...
printer-friendly version of benchmark
... The main reason Wegener’s hypothesis was not accepted was because he suggested no mechanism for moving the continents. His belief that the force of Earth’s spin (rotation) was enough to cause the continents to move was not shared by the geologists of the time who knew that rocks were too strong for ...
... The main reason Wegener’s hypothesis was not accepted was because he suggested no mechanism for moving the continents. His belief that the force of Earth’s spin (rotation) was enough to cause the continents to move was not shared by the geologists of the time who knew that rocks were too strong for ...
Planetary Differentiation Teacher Notes
... How does this experiment help to explain how early Earth became layered into crust, mantle and core? ...
... How does this experiment help to explain how early Earth became layered into crust, mantle and core? ...
tectonics
... Wegener in the early 20th century is the forerunner to the modern theory of plate tectonics. It was based on the observation that many continents "fit together like a jigsaw puzzle" (e.g. S. America and Africa) and, if joined back together, many similarities exist in rock types, geologic structures ...
... Wegener in the early 20th century is the forerunner to the modern theory of plate tectonics. It was based on the observation that many continents "fit together like a jigsaw puzzle" (e.g. S. America and Africa) and, if joined back together, many similarities exist in rock types, geologic structures ...
2 Precambrian Time and the Paleozoic Era
... had moved and collided, or crashed into each other. This movement formed the supercontinent Pangaea. The collisions lifted large areas of land and formed mountain ...
... had moved and collided, or crashed into each other. This movement formed the supercontinent Pangaea. The collisions lifted large areas of land and formed mountain ...
Slideshow
... found on different continents Shape of the continents fit together like puzzle pieces Rocks are found in different continents that are the same composition Called this supercontinent Pangea, Greek for “all Earth” 245 Million years ago Could not explain why the plates moved http://members.enchantedle ...
... found on different continents Shape of the continents fit together like puzzle pieces Rocks are found in different continents that are the same composition Called this supercontinent Pangea, Greek for “all Earth” 245 Million years ago Could not explain why the plates moved http://members.enchantedle ...
by William J. Crornie Rapidly developing technologies are
... beneath the Pacific and Indian oceans. High and low anomalies alternate, with a wavelength of 150 to 220 kilometers. Haxby and Weissel attribute these to convective motion in the relatively soft upper layer of the mantle on which the plates move. The negative anomalies may be attributable to cold m ...
... beneath the Pacific and Indian oceans. High and low anomalies alternate, with a wavelength of 150 to 220 kilometers. Haxby and Weissel attribute these to convective motion in the relatively soft upper layer of the mantle on which the plates move. The negative anomalies may be attributable to cold m ...
Exam 2 powerpoint review
... C. Radioactive decay 1. Decay rates of radioactive atoms are constant 2. Half Life: time it takes for half the atoms of the parent isotope to decay, ranges from tens of billions of years to thousandths of a second. ...
... C. Radioactive decay 1. Decay rates of radioactive atoms are constant 2. Half Life: time it takes for half the atoms of the parent isotope to decay, ranges from tens of billions of years to thousandths of a second. ...
Layers of the Earth
... Where the two plates meet, one is usually subducted Subducted means to go beneath The plate that is subducted is destroyed in the mantle This is why convergent plate boundaries are called destructive plate margins ...
... Where the two plates meet, one is usually subducted Subducted means to go beneath The plate that is subducted is destroyed in the mantle This is why convergent plate boundaries are called destructive plate margins ...
Geography 12
... Where the rock surfaces are rough, the plates get stuck on each other. The pressure continues to build up eventually to be released as an earthquake. The longer the pressure builds, the stronger and more destructive the earthquake. ...
... Where the rock surfaces are rough, the plates get stuck on each other. The pressure continues to build up eventually to be released as an earthquake. The longer the pressure builds, the stronger and more destructive the earthquake. ...
Earth: Portrait of a Planet 3rd edition
... Rocks – Aggregates of minerals. There are many types. ...
... Rocks – Aggregates of minerals. There are many types. ...
On this day in 1815, Women`s Rights Leader Elizabeth Cady
... a. outer core, mantle, inner core, crust b. mantle, crust, inner core, outer core c. inner core, outer core, mantle, crust d. crust, mantle, outer core, inner core ...
... a. outer core, mantle, inner core, crust b. mantle, crust, inner core, outer core c. inner core, outer core, mantle, crust d. crust, mantle, outer core, inner core ...
INTERNAL STRUCTURE OF THE EARTH AND PLATE TECTONICS
... – Made up of the rigid mantle and crust – Cool, strong, outermost layer of Earth; averages about 100 km thick – Thin at mid-oceanic ridges; 120 km under oceans – 40-400 km thick under continents ...
... – Made up of the rigid mantle and crust – Cool, strong, outermost layer of Earth; averages about 100 km thick – Thin at mid-oceanic ridges; 120 km under oceans – 40-400 km thick under continents ...
How Do Diamonds Form?
... are too small for use as gems or industrial abrasives; however, they are a source of diamond material ( See Location 4 in the diagrams above). Smithsonian researchers also found large numbers of tiny diamonds when they were cutting a sample from the Allen Hills meteorite . These diamonds in meteorit ...
... are too small for use as gems or industrial abrasives; however, they are a source of diamond material ( See Location 4 in the diagrams above). Smithsonian researchers also found large numbers of tiny diamonds when they were cutting a sample from the Allen Hills meteorite . These diamonds in meteorit ...
Cooperative Institute for Dynamic Earth Research 2016 CIDER
... infrastructure for data gathering and distribution • Across-disciplinary educational environment to prepare the next generation of earth scientists ...
... infrastructure for data gathering and distribution • Across-disciplinary educational environment to prepare the next generation of earth scientists ...
Layers Of The Earth
... 4,400-6,000 degrees Celsius. • The second innermost layer, the Outer Core, Is the liquid layer that creates the magnetic field by swirling around the Outer Core and is between 4,500 and 5,500 degrees Celcius. • The Mantle is the semi-liquid layer that create the majority of the Earths mass and allow ...
... 4,400-6,000 degrees Celsius. • The second innermost layer, the Outer Core, Is the liquid layer that creates the magnetic field by swirling around the Outer Core and is between 4,500 and 5,500 degrees Celcius. • The Mantle is the semi-liquid layer that create the majority of the Earths mass and allow ...
Plate Tectonics - Down To Earth Science
... The age of the sea floor provided further evidence. The oldest part of the sea floor is only 160 to 180 million years old, while the continental crust is much older (up to 4 billion years old). This confirmed that the ocean floor is constantly forming and moving away from the mid-ocean ridges like a ...
... The age of the sea floor provided further evidence. The oldest part of the sea floor is only 160 to 180 million years old, while the continental crust is much older (up to 4 billion years old). This confirmed that the ocean floor is constantly forming and moving away from the mid-ocean ridges like a ...
PLATE TECTONICS STUDY GUIDE
... 8. WHAT LAYER OF THE EARTH IS DIVIDED INTO PLATES? Lithosphere (crust and portion of upper mantle) 9. WHAT MATERIAL IS THE CORE MADE OF? Iron and nickel 10. WHAT IS THE THINNEST LAYER OF THE EARTH? crust 11. WHAT IS THE ASTHENOSPHERE? Portion of mantle that is fluid enough for the plates to float on ...
... 8. WHAT LAYER OF THE EARTH IS DIVIDED INTO PLATES? Lithosphere (crust and portion of upper mantle) 9. WHAT MATERIAL IS THE CORE MADE OF? Iron and nickel 10. WHAT IS THE THINNEST LAYER OF THE EARTH? crust 11. WHAT IS THE ASTHENOSPHERE? Portion of mantle that is fluid enough for the plates to float on ...
Crust
... 26. Explain how to continents have changed over millions of years. • They have separated over time. 27. Explain how sea floor spreading occurs. • Magma rises and cools at the rift valley of a mid-ocean ridge forming new crust, while the older crust is pushed away 28. What happens to the older crust ...
... 26. Explain how to continents have changed over millions of years. • They have separated over time. 27. Explain how sea floor spreading occurs. • Magma rises and cools at the rift valley of a mid-ocean ridge forming new crust, while the older crust is pushed away 28. What happens to the older crust ...
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.