Weba local variation in the Earth's magnetic field resulting from variations in the chemistry or magnetism of the rocks. magnetic anomaly True False 5 of 20 Term Definition the science that deals with the earth's physical structure and substance, its history, and the processes that act on it. Geology True False 6 of 20 Term Definition WebWhat is the outermost compositional layer of the Earth? Crust The mantle is composed mainly of minerals that are rich in which two elements? Iron and magnesium Tectonic plates are made of what structural layer? Pieces of lithosphere What process drives mantle convection? The transfer of thermal energy from Earth's core toward its surface.
Age of the Earth Flashcards Quizlet
Webtwo reasons for thinking the earth's core is liquid: 1) s-waves were blocked by earth's interior: geologists believe that they were absorbed by a liquid core at Earth's center and that P-waves are "refracted" at the core boundary 2) presence of magnetic field (dynamo theory) What does differentiation tell us about the Earth's history? Weban earthquake What does the theory of plate tectonics say about the earth's surface? The earth is broken into many pieces. Plate tectonics can help to explain which of the following? trenches Alfred Wegener said that earth's continents are moving. Which evidence supports this theory? close geometric correspondence of continental coastlines tozlu yaka instagram
Earth
WebEarth came together from the cloud of dust and gas known as the solar nebula nearly 4.6 billion years ago, the same time the sun and the rest of the solar system formed. What is differentiation? The action or process of differentiating. What was the first crust of the Earth? Basaltic, like the oceanic crust is today. WebStudy with Quizlet and memorize flashcards containing terms like The greenhouse effect plays a major role in the climate of a planet. Choose all the statements below that are correct. Note that 273 K = 0°C = 32°F. Choose one or more: A. If there were no greenhouse effect, liquid water would not exist on the surface of the Earth. B. The Earth absorbs … WebAs understood by geoscience, the Earth is 4.6 billion years old. - this number is based on the age of the oldest rocks on Earth (fossils, sediment deposition, Earth cooling from a molten state, radioactive decay, etc.) - between 1800-1850, geologists started to believe the Earth was much older than postulated. Kelvin's Age of the Earth. tozluyaka ep 7 subtitrat in romana