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Crust - www .alexandria .k12 .mn .us
Crust - www .alexandria .k12 .mn .us

... The Earth is composed of four different layers. The crust is the layer that you live on, and it is the most widely studied and understood. The mantle is much hotter and has the ability to flow. The outer core and inner core are even hotter with pressures so great you would be squeezed into a ball sm ...
6th - inside earth study guide1
6th - inside earth study guide1

... volcano – forms where plates diverge and magma reaches earths surface & where plates collide and one subducts into the mantle forming molten material mountain building – when two plates collide & crush together causing land to be pushed up, resulting in the folding and breaking of Earth’s crust ...
Inside Earth Test Study Guide
Inside Earth Test Study Guide

... volcano – forms where plates diverge and magma reaches earths surface & where plates collide and one subducts into the mantle forming molten material mountain building – when two plates collide & crush together causing land to be pushed up, resulting in the folding and breaking of Earth’s crust ...
Rock Cycle Questions and Short Story
Rock Cycle Questions and Short Story

... Determine which type of rock was created by the following event: 1. Magma rose from the mantle and slowly cooled in a crack deep below the earth’s surface. 2. An earthquake shook a mountain causing an avalanche. The rocks fell down the side of a mountain and landed in a shallow ocean where they were ...
Introduction
Introduction

... • It is unprejudiced; one does not have to believe a given researcher, one can redo the experiment and determine whether the results are valid • It is repeatable: most experiments and observations are repeated many times • The theory must be falsifiable; there must be some experiment or possible dis ...
IMPORTANT CONCEPTS
IMPORTANT CONCEPTS

... Metamorphic rock--changed rock that doesn’t melt ...
Chap 01 Earth Structure
Chap 01 Earth Structure

... Density - some examples Air = 0.00129 g/cm3 Ice = 0.917 g/cm3 Water = 1.0 g/cm3 remember this Granite = 2.65 to 2.8 g/cm3 Iron = 7.86 g/cm3 Gold = 19.3 g/cm3 ...
8 th Grade Science Midterm Review (Ms. Mendoza)
8 th Grade Science Midterm Review (Ms. Mendoza)

... (8.8D)S Model and describe how light years are used to measure distances and sizes in the universe; Draw a Model to describe how light years measure distance in the universe. ...
Earth`s Structure
Earth`s Structure

... Mesosphere: strong, lower part of mantle Outer Core: liquid Inner Core: solid; both parts iron with some nickel ...
Geology 12 - BC Science Teachers` Association
Geology 12 - BC Science Teachers` Association

... Evaluate geological maps and 3D models, with the aid of geological symbols (e.g., strike and dip symbols, syn-form and anti-form symbols), to identify and classify various types of folds and faults and subsurface structures. ...
The Rock Cycle - Science A 2 Z
The Rock Cycle - Science A 2 Z

... Basalt is the most common type of extrusive igneous rock and the most common rock type at the Earth's surface. ...
Dynamic Earth WebQuest
Dynamic Earth WebQuest

... 8. Plate Tectonics Theory has been widely accepted since the ___________’s. It states that Earth’s outer layer or _________________ is broken up into ________________. These plates hold ______________________ and _____________________. They are constantly _________________. 9. Continents over time B ...
Earthquakes and Volcanoes ppt
Earthquakes and Volcanoes ppt

... Volcanic Eruptions continued: Explosive:  They are rare, but very destructive  Clouds of hot debris, ash, and gas repeatedly shoot out of the volcano  Pyroclastic flows erupt from the volcano producing molten rock, which hardens in the air, and dust sized particles of ash. The ash can reach the u ...
6.4 NOTES What is plate tectonics? Objectives: Name some crustal
6.4 NOTES What is plate tectonics? Objectives: Name some crustal

Homework #6 Chapter 5: Earth and Moon Due
Homework #6 Chapter 5: Earth and Moon Due

... Certain types of seismic waves, S-waves, cannot travel through liquid rock. Another type, P-waves, can travel through liquid but are refracted. The “shadow zones” for both types of waves, or areas on Earth’s surface where the different waves cannot be detected after an earthquake, indicate that part ...
Presentation - Copernicus.org
Presentation - Copernicus.org

... promoted especially to explosion of photosynthesizing organisms. The manifestation of this geochemically enriched magmatism was correlated with the first finds of eucaryotic heterotrophic organisms at ~ 2 Ga, for example in black shales and phosphorites of the Paleoproterozoic ...
summing-up - Zanichelli online
summing-up - Zanichelli online

... transgression and the formation of new sedimentary rocks, unconformally on the older ones. Over billions of years, the traces of numerous cycles, similar to that described, can be seen in the rocks in the Earth’s crust. ...
Earth Science 4
Earth Science 4

... getting larger? • Choose a side, either yes or no. • Come up with some ideas to support your choice. ...
Name________________________________________
Name________________________________________

... b. the large continents that exist today. c. pieces of large landmasses that broke apart. d. large oceans that covered Earth in the past. ______ 18. Supercontinents form when a. rifts form in the lithosphere. b. new convergent boundaries form after continents collide. c. heat builds up in Earth’s in ...
7 - English River School
7 - English River School

... soil found in those zones, what would you expect to find growing in that type of soil? ...
INSTRUCTIONAL OVERVIEW Teacher_Susan Steele____ Class
INSTRUCTIONAL OVERVIEW Teacher_Susan Steele____ Class

... INSTRUCTIONAL OVERVIEW ...
earth`s components & characteristics
earth`s components & characteristics

... • Magma comes to surface & cools, creating crust • Usually in oceans, but can occur in continents (Africa’s Rift Valley) • Creates mid-ocean ridges • EX: Mid-Atlantic Ridge created when N.American plate pulls away from Eurasian plate. ...
Earth`s Interior (pages 6–13)
Earth`s Interior (pages 6–13)

... Key Concept: Geologists have used two main types of evidence to learn about Earth’s interior: direct evidence from rock samples and indirect evidence from seismic waves. • Scientists cannot travel inside Earth to explore it. So scientists must learn about Earth’s interior, or inside, in other ways. ...
anddestructiveforces_powerpoint
anddestructiveforces_powerpoint

... crack and break apart. Roots and plants also push into the rocks and break them apart. They act like wedges and push the rocks apart. Little animals also help by burrowing and digging through the ground. ...
What causes Earthquakes? Earthquake Tip 1 Learning
What causes Earthquakes? Earthquake Tip 1 Learning

... like the convective flow of water when heated in a beaker (Figure 2). The energy for the above circulations is derived from the heat produced from the incessant decay of radioactive elements in the rocks throughout the Earth’s interior. These convection currents result in a circulation of the earth’ ...
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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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