- IMSA Digital Commons
... • Planets are complicated dynamic systems. • The dynamic changes that planets go through are driven by energy. • For the terrestrial planets the two main sources of this energy are the Sun and internal radioactive decay. ...
... • Planets are complicated dynamic systems. • The dynamic changes that planets go through are driven by energy. • For the terrestrial planets the two main sources of this energy are the Sun and internal radioactive decay. ...
2007 Exam 1 - MSU Billings
... A) They formed after all the gas had been used up. B) They are so cold that all their gases have frozen into deposits below their surface. C) They formed before the solar nebula had captured any gas. D) They are so small that their gravity is too weak to retain an atmosphere. 2. Felsic rocks … A) ar ...
... A) They formed after all the gas had been used up. B) They are so cold that all their gases have frozen into deposits below their surface. C) They formed before the solar nebula had captured any gas. D) They are so small that their gravity is too weak to retain an atmosphere. 2. Felsic rocks … A) ar ...
Earth structure
... The crust is made of about twelve plates. These are like big rafts floating on the semi-molten mantle. Convection currents within the mantle cause the plates to move. Although they only move about 2 cm/year this can have huge effects over long periods of time. ...
... The crust is made of about twelve plates. These are like big rafts floating on the semi-molten mantle. Convection currents within the mantle cause the plates to move. Although they only move about 2 cm/year this can have huge effects over long periods of time. ...
Historical Geology - Department of Geology UPRM
... Geologic Time • From the human perspective time units are in – seconds, hours, days, years ...
... Geologic Time • From the human perspective time units are in – seconds, hours, days, years ...
Historical Geology - Louisiana State University
... Geologic Time • From the human perspective time units are in – seconds, hours, days, years ...
... Geologic Time • From the human perspective time units are in – seconds, hours, days, years ...
Conditions on early Earth made the origin of life possible
... The actual ages of rocks and fossils mark geologic time Radiometric dating measures the decay of radioactive isotopes “Young” fossils may contain isotopes of elements that accumulated when the organisms were alive – Carbon-14 can date fossils up to 75,000 years old ...
... The actual ages of rocks and fossils mark geologic time Radiometric dating measures the decay of radioactive isotopes “Young” fossils may contain isotopes of elements that accumulated when the organisms were alive – Carbon-14 can date fossils up to 75,000 years old ...
CH. 7 Review WS #1
... 23. True or False--The inner core of the Earth is solid and made primarily of iron. 24. True or False--Temperature and pressure increase toward the center of the Earth. 25. True or False--The asthenosphere is the thinnest layer. Use the following terms to label the diagram below. Then use the terms ...
... 23. True or False--The inner core of the Earth is solid and made primarily of iron. 24. True or False--Temperature and pressure increase toward the center of the Earth. 25. True or False--The asthenosphere is the thinnest layer. Use the following terms to label the diagram below. Then use the terms ...
100 Facts – Earth Science
... 69. Salt water intrusion is the movement of saline water into areas of freshwater near coasts and beaches. 70. As the population on Earth increases, water availability decreases. 71. A watershed is the area of land where all of the water goes into the same place. 72. Water quality can be reduced due ...
... 69. Salt water intrusion is the movement of saline water into areas of freshwater near coasts and beaches. 70. As the population on Earth increases, water availability decreases. 71. A watershed is the area of land where all of the water goes into the same place. 72. Water quality can be reduced due ...
Why Plates Move… - Mr Vincent Science
... The theory of plate tectonics explains how the plates move but not why. What do we know about the earth’s mantle and crust that might help us determine the mechanisms involved? Seismic data tells us that the mantle is fluid The core of the earth is quite hot – heat left over from the earth’s formati ...
... The theory of plate tectonics explains how the plates move but not why. What do we know about the earth’s mantle and crust that might help us determine the mechanisms involved? Seismic data tells us that the mantle is fluid The core of the earth is quite hot – heat left over from the earth’s formati ...
Final Exam Topics
... samples of the solar nebula, Differentiation of the Earth, Stony and iron meteorites as samples of the mantle and the core, peridotite, Compositions of the mantle and the core, Early volcanic activity on terrestrial planets, Formation of the oceans, Formation of the atmosphere, Stromatolites as buil ...
... samples of the solar nebula, Differentiation of the Earth, Stony and iron meteorites as samples of the mantle and the core, peridotite, Compositions of the mantle and the core, Early volcanic activity on terrestrial planets, Formation of the oceans, Formation of the atmosphere, Stromatolites as buil ...
Chapter 1 - Earth System
... • Earth’s topography (surface elevation) ranges nearly 20 km from highest to lowest. • Sea level – reference level for all Earth surface and ...
... • Earth’s topography (surface elevation) ranges nearly 20 km from highest to lowest. • Sea level – reference level for all Earth surface and ...
Plate Tectonics Key Concepts List
... A boundary where two plates collide………………………………………convergent A boundary where two plates move away from each other…………………divergent The part of the mantle that can bend like plastic……………………….asthenosphere The process that continually adds new material to the ocean floor…………sea-floor spreadin ...
... A boundary where two plates collide………………………………………convergent A boundary where two plates move away from each other…………………divergent The part of the mantle that can bend like plastic……………………….asthenosphere The process that continually adds new material to the ocean floor…………sea-floor spreadin ...
Earth`s Layers Lesson Plan - elementaryscienceteachers
... Model: Show the students a mini Milky Way bar. Ask them what they think a Milky Way bar and the Earth have in common. Ask them if they think that they could make any comparisons between the candy and the Earth. Create a list of comparisons between the Earth and Milky Way Bar that the students offer. ...
... Model: Show the students a mini Milky Way bar. Ask them what they think a Milky Way bar and the Earth have in common. Ask them if they think that they could make any comparisons between the candy and the Earth. Create a list of comparisons between the Earth and Milky Way Bar that the students offer. ...
Pizza Slice Earth
... 1. Tape two 11” by 17” sheets of paper together along the short side. 2. Draw a dotted line down the center of your paper that is 63.7 cm long. 3. At one end of your center line place a dot and label “center point”. 4. At the other end of your center line, pencil in two dashed “width points” at ____ ...
... 1. Tape two 11” by 17” sheets of paper together along the short side. 2. Draw a dotted line down the center of your paper that is 63.7 cm long. 3. At one end of your center line place a dot and label “center point”. 4. At the other end of your center line, pencil in two dashed “width points” at ____ ...
Angular unconformity
... thought that the Earth was only 6,000 years old. This mindset was based on biblical references. ...
... thought that the Earth was only 6,000 years old. This mindset was based on biblical references. ...
Section 1 - Pelham City Schools
... • National Hazards Maps used by cities, counties & local governments to update & create more ...
... • National Hazards Maps used by cities, counties & local governments to update & create more ...
Earth`s Interior and Geophysical Properties
... - rocks are close to melting point - which is controlled by T and P - may be partially molten - crystal and liquid slush - makes them weaker - can be deformed in a ductile manner c. Lower Mantle (compositional) also called Mesosphere (geophysical) -400 km - concentric layers at these depths -670 km ...
... - rocks are close to melting point - which is controlled by T and P - may be partially molten - crystal and liquid slush - makes them weaker - can be deformed in a ductile manner c. Lower Mantle (compositional) also called Mesosphere (geophysical) -400 km - concentric layers at these depths -670 km ...
Eighth Grade ScienceEarth`s HistoryStudy Guide
... 4. Who proposed the theory of continental drift? Alfred Wegner 5. Why did scientists NOT support the theory of Continental Drift? Wegner could NOT explain how or why the plates moved. 6. What is subduction? When one plate goes under another plate and it is melted back into the mantle. 7. The Earth’s ...
... 4. Who proposed the theory of continental drift? Alfred Wegner 5. Why did scientists NOT support the theory of Continental Drift? Wegner could NOT explain how or why the plates moved. 6. What is subduction? When one plate goes under another plate and it is melted back into the mantle. 7. The Earth’s ...
The Dynamic Earth
... The Thermosphere • The location of the Northern and Southern Lights (aurora’s). • Temps reach 2000ºC, but would not feel hot to us because the air is so thin there are few collisions of air particles. (diff. between temp and heat!) ...
... The Thermosphere • The location of the Northern and Southern Lights (aurora’s). • Temps reach 2000ºC, but would not feel hot to us because the air is so thin there are few collisions of air particles. (diff. between temp and heat!) ...
Chapter 8
... Radiometric dating • Principle of radioactive dating – The percentage of radioactive atoms that decay during one half-life is always the same (50 percent) – However, the actual number of atoms that decay continually decreases – Comparing the ratio of parent to daughter yields the age of the sample – ...
... Radiometric dating • Principle of radioactive dating – The percentage of radioactive atoms that decay during one half-life is always the same (50 percent) – However, the actual number of atoms that decay continually decreases – Comparing the ratio of parent to daughter yields the age of the sample – ...
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.