11 How did an understanding of radioactive decay and radiometric dating influence the debate? To check your answers, visit 1dating.info The Breakthrough: From Seafloor Spreading to Plate Tectonics In , Harry Hess of Princeton University and Robert Dietz of the Scripps Institution of Oceanography. How did an understanding of radioactive decay and radiometric dating influence the debate. Adviseable doing to Attendings why besides you'd expect anymore " interview" dates. Good on paper for radiometric dating but it did not hold up. Is dating wrong biblically. To understand this point, we need So what do the. How did echo sounding, influence the debate?, an understanding of radiometric dating The following graph illustrates radioactive decay of a fixed amount of. Rutherford took the first step toward radiometric dating by suggesting that the alpha particles. Free dating site victoria. My understanding is that isochrons measure.
The Earth's rocky outer crust solidified billions of years ago. What kinds of plate boundaries exist? Methods of scientific dating based upon radioactive decay. Is based on measurement of the product of the radioactive decay of.
Why did I write that theres one world ocean? What about the pacific and Atlantic oceans, the "seven seas"? There are few dependable natural oceanic divisions, only one great mass of water. The pacific and Atlantic Oceans, the Mediterranean and other seas, so named for our convenience, are in reality only temporary features of a single world ocean. Do not depend on amount of sample being examined. List of Terms Flip Flashcards Optimal Learn Optimal Learn will design a customized study program to help you master this flashcard set by a given deadline.
Large Terms on one side and Definitions on other side of the page Option 2: Large Terms and Definitions side by side on the same page 3" x 5" index card Index card size with Terms on one side and Definition on other side. What force did Wegener believe was responsible for the movement of continents? Wegener believed that the heavy continents were slung toward the equator on the spinning Earth by a centrifugal effect.
He was wrong in that belief, but correct in sensing that continents were moving. Where were the tracks through old seabed that the migrating continents might leave?
What forces were strong enough to propel continents over long distances? Something is said to be dense if it weighs a lot per unit of volume. Density is an expression of the relative heaviness of a substance.
NOTE- the 3 is spoused to be up higher and smaller. Nicholas couldn't figure out how to do that one on the computer and is a little to lazy at the moment. No one has yet sampled below Earth's outermost layer, the here. Seismic waves form in two types: Surface waves can sometimes be seen as an undulating wave-like motion in the ground.
Surface waves cause most of the property damage suffered in an earthquake.
To understand this point, we need. Do you live on a terrane? The lithosphere is supported by denser asthenosphere. Large Terms and Definitions side by side on the same page 3" x 5" index card Index card size with Terms on one side and Definition on other side.
Body waves P waves and S waves are less dramatic, but they are useful for analyzing Earth's interior structure. The P wave or primary waveis a compressional wave similar in behavior to a sound wave. Rapidly pushing and pulling a very flexible spring like a Slinky generate P waves. The S wave or secondary wave is a shear wave like that seen in a rope shaken more info to side. The P and S waves from Alaska were very large and easily detected at great distances.
When correlated with the frequency, intensity, and phase characteristics of the waves, this information helped to confirm the models of Earth layering. Earth's layers are classified by composition and by physical properties. Understanding the physical properties of the layers is important in understanding tectonic processes.
Lithosphere includes crust oceanic and continental and rigid upper mantle down to the asthenosphere.
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Note that the rigid sandwich of crust and upper mantle-thelithosphere-floats on and is supported by the denser deformable asthenosphere. A continent floats How Did An Understanding Of Radioactive Decay And Radiometric Dating Influence The Debate sea level because the lithosphere gradually sinks into deformable asthenosphere until it has displaced a volume of asthenosphere equal in mass to the continent's mass.
Because granite is comparatively light, the top of the continent can float high above sea level. The outer core is thought to be liquid. Much of the heat inside Earth results from the decay of radioactive elements. Some of the internal heat journeys toward the surface by conduction-the here process that makes a frying pan's handle hot.
Understand Earth's age was hampered by an interpretation of the biblical account of creation. At the end of the eighteenth century The Prime Minister Is Ep Recap European natural scientists believed in a young Earth, one that had formed only about 6, years ago.
Since believed in a young Earth, one that had formed only about 6, years ago. Since many of the processes observed on Earth had clearly operated for much greater spans of time, confusion was understandable.
The jigsaw-puzzle fit of continents around the Atlantic and the distinctly non-random distribution of earthquakes stimulated vigorous discussion in geological circles. Hugo Benioff's plots of earthquake activity surrounding the Pacific Ring of Fire demanded explanation, and researchers redoubled their efforts to discover the links after the conclusion of the Second World War. Radiometric dating allowed rock sequences to be dated and their relative positions through time determined.
Radiometric studies also solidified understaning of Earth's age, assuring researchers that Earth was indeed older than 6, years and that time was sufficient for large-scale seafloor spreading. In John Tuzo Wilson integrated the ideas of continental drift and seafloor spreading into the overriding concept of plate tectonics. The three types of plate boundaries that result from these interactions are called divergent, convergent, and transform boundaries,depending on their sense of movement.
Ocean basins are formed at divergent plate boundaries;island arcs form, continents collide, and crust recycles at convergent plate boundaries; crust fractures and slides at transform plate boundaries. Through spreading speeds can reach a rate of 18 centimeters 7 inches a year along parts of the pacific plate, most plates move more slowly, about 3 centimeters 1.
A subducting plate's periodic downward lurches cause earthquakes and tsunami. Earths magnetic field reverses at irregular intervals of a few hundred thousand years. In a time of reversal a How Did An Understanding Of Radioactive Decay And Radiometric Dating Influence The Debate needle would point south instead of north, and any particles of magnetic material falling below their curie points in fresh seafloor basalt at a spreading center would be imprinted with the reversed field.
The alternating magnetic stripes represent rocks with alternating magnetic polarity-one band having normal polarity magnetized in the same direction as todays magnetic field direction and the next band having reversed polarity opposite from todays direction. Researchers realized that the pattern of alternating weak and strong magnetic fields was symmetrical because freshly magnetized rocks born at the ridge are spread apart and carried away from the ridge by plate movement.
Hot spots are one of the surface expressions of plumes of magma rising from relatively stationary visit web page of heat in the mantle.
My favorite hot spot is iceland, but the island of Hawaii is a close second. The pacific plate is moving northwest relative to a mantle plume anchored in the mantle below.
Subduction guarantees young seafloors. This process takes less than million years, so the seabed and its sediments are always young. You might live on a terrane. A review of the bulleted list in this section will provide you with these answers. It's difficult to underestimate the effect our understanding of plate tectonics has had on all areas of science. Coal in the Antartic? Latitudinal variations in the Australian barrier Reef?
Similar fossils across seperated continents? Earthquake distribution and prediction? Read article Hide example sentence Example Sentence: Show Hide hint Hint: Related Flashcards 27 terms Term: Related Documents 4 pages.
Ask a homework question - tutors are online. What were the greatest objections to Wegener's hypothesis? What do we mean when we say something is dense? How is density expressed units?
Has anybody drilled into Earth's densest interior layers?
OCEANOGRAPHY Concept questions chapter 3 Flashcards - Course Hero
What are the two kinds of seismic waves? Which causes most of the damage in an earthquake? Which are the most useful in determining the nature of Earth's interior?
Differentiate between P waves and S waves. Which can go through fluids? How did the Alaska Earthquake enhance our understanding of Earth's interior?
Radioactive Dating, Accurate or Not?
How are Earths inner layers classified? What's the relationship between crust and lithosphere? Between lithosphere and asthenosphere? How can something as heavy as a continent be so high? The Himalayas are more than 8, kilometers 29, feet high-what holds them up there? Which part of Earth's interior is thought to be a liquid. Why is the inside source Earth so hot?
How does heat move from the inner Earth to the surface? Why were traditional views of the age of Earth an impediment to early understanding of Earth's inner structure? How did a careful plot of earthquake locations affect the discussion of the Theory of Continental Drift as source was first called? What about the jigsaw- puzzle- like fit of continents around the Atlantic? How did an understanding of radioactive decay and radiometric dating influence the debate?
What was the key insight that Hess and Wilson brought to the discussion? Can you outline- in very simple terms-theaction of Earth's crust described by the theory of plate tectonics?
Look up figure 3. What kind of plate boundaries exist? What happens at each of the plate boundaries.? About how fast do plates move? Which kind of plate movement is related to earthquakes and tsunami?