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Earth`s - s3.amazonaws.com
Earth`s - s3.amazonaws.com

... – Zircon is a very stable mineral that commonly occurs in small amounts in granite. ...
7.4 Forces that move plates.
7.4 Forces that move plates.

... Because of this, rocks near mid-ocean ridges tend to be higher up than those that are father away. As you move farther away from the mid-ocean ridge rocks tend to subside. ...
Study Guide: Earth`s Layer, Pangaea, Plate Tectonics, Minerals and
Study Guide: Earth`s Layer, Pangaea, Plate Tectonics, Minerals and

... Formed when molten rock cools and becomes a solid B. Sedimentary Rock: Forms when rock, sand, plants and other sediments layer and are cemented together by pressure over time C. Metamorphic Rock: Rocks that form when heat and pressure are applied to an existing parent rock, changing the rock’s form ...
The Earth`s Layers Foldable
The Earth`s Layers Foldable

Layers of the Earth Foldable Directions
Layers of the Earth Foldable Directions

... 9. On the 2nd page, you will be identifying the mechanical (physical) layers of the earth. Write the word “Mechanical (Physical) Layers” in the upper right hand corner of page 2. Mechanical/Physical Layering - Because of variations in temperature and in pressure, the materials inside the earth vary ...
NASC 1100 - The University of Toledo
NASC 1100 - The University of Toledo

... Principal minerals contain silicon: quartz, feldspar, mica. If molten lava cools quickly, it forms natural glass called obsidian. Grain size in the igneous minerals contains information about both the cooling rate and the cooling environment. Fast cooling gives fine-grained rocks, which come to the ...
1. 1. Draw a subduction zone in which an oceanic plate collides with
1. 1. Draw a subduction zone in which an oceanic plate collides with

... Here’s how to make your drawing: go to http://www.imaginationcubed.com/, follow the instructions for creating your drawing. Then click "send" and send me ([email protected]) a link to your drawing. Do not worry if you are not an accomplished artist! Just give it a shot. ...
Seafloor spreading - Gwen
Seafloor spreading - Gwen

... • Seafloor spreading: divergent boundaries • Earth’s magnetic field ...
Earth Geology/Tectonics
Earth Geology/Tectonics

... – Big deal is that the conditions on earth were different back then, so we can’t understand those happenings using the same techniques we apply to today – Supported by church orthodoxy, very popular He remembers when rock was young. ...
Plate Tectonics - BSHYear7Geography
Plate Tectonics - BSHYear7Geography

... explain continental drift with the theory of plate tectonics. The Earth's surface is made up of a number of large plates that are in constant, slow motion. The ocean floors are continually moving, spreading from the centre and sinking at the edges. The edges of these plates – plate boundaries – are ...
Weathering and Erosion Powerpoint
Weathering and Erosion Powerpoint

... has stayed the same for thousands of years. ...
Weathering and Erosion
Weathering and Erosion

... has stayed the same for thousands of years. ...
Season`s Notes
Season`s Notes

... once, the earth rotates once a day. Revolution – The time it takes one object to go around another. The earth revolves around the sun once a year or every 365.24 days. ...
The Dynamic Earth - Fort Thomas Independent Schools
The Dynamic Earth - Fort Thomas Independent Schools

... • The surface of the Earth is heated by visible light from the Sun. The Earth then radiates thermal energy as infrared light. • The presence of greenhouse gases, CO2 and H2O and methane (CH4) and a few other trace gases, serve to trap or absorb some of the infrared light radiated from the Earth’s su ...
Sedimentary Rocks
Sedimentary Rocks

... Sedimentary Rock - Sediment – small pieces or fragments of weathered rock - Wide range of sizes of particles  Smaller than sand to larger than a car  Generally pebble size and smaller is meant by the term sediment ...
Worlds in Eruption
Worlds in Eruption

Earth`s Changing Surface
Earth`s Changing Surface

... What are hot spots and give examples? Do these hot spots occur along one of the plate boundaries? ________________________________________________________________________________________ ________________________________________________________________________________________ ...
Complete the sentences with the following expressions
Complete the sentences with the following expressions

... Elevation is the …height.. (high) above sea level. Our professor put forward his two new … hypotheses.. (hypothesis). …Oceanography… is the science concerned with the oceans. …Physicist… is a scientist concerned with physics. Give the proper forms past tense or past participle: Contour lines are not ...
Pre-Test: Chapter 7-Plate Tectonics
Pre-Test: Chapter 7-Plate Tectonics

... 19. Which of the following is associated with transform boundaries? a. slab pull c. sea-floor spreading b. magnetic reversal d. earthquakes ...
Earth as a Planet – Glossary Part 1 Nebulae E. Stellar
Earth as a Planet – Glossary Part 1 Nebulae E. Stellar

... _______ Rock formed by the freezing of magma underground _______ rock that forms by the freezing of lava above ground, after it flows or explodes out onto the surface and comes into contact with the atmosphere or ocean _______ rock that forms either by the cementing together of fragments broken off ...
Chapter-2_PracticeTest
Chapter-2_PracticeTest

... 12. When magma from beneath Earth’s surface erupts as a volcano, which of the following happens? a) The amount of gas dissolved in the magma increases. b) The pressure on the magma increases. c) The amount of gas dissolved in the magma decreases. d) The amount of water vapor in the air decreases ...
Chapter 33
Chapter 33

... Shrinking Earth Theory • Believed that the cooling of the planet resulted in its contraction. • Sea Floor spreading video http://www.iteachbio.com/Earth_Science/Earth _Science/earth.htm ...
Determining the Relative Age of Rocks
Determining the Relative Age of Rocks

... The Law of Superposition states that in undisturbed sedimentary rock layers, younger rocks are on the top while older rocks are on the bottom. However, forces such as folding, faulting and uplifting can rearrange the rock layers so the youngest is not always found on top. Over millions of years, the ...
Name Class___________ Date
Name Class___________ Date

... _____4. Part of the east coast of South America and the west coast of Africa have matching fossils. This provides evidence that these two continents were once: (1) separated by an ocean (2) joined together as one landmass (3) located near the North Pole _____5. Many scientists believe that plate mov ...
6th Grade Science
6th Grade Science

... November Study ...
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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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