Kids Club - Egg Tectonics
 

 

 
Home » Egg Tectonics
 
 
Kids Club - Egg Tectonics
 

Egg Tectonics

Description of plate tectonics using eggs
Plate tectonics, or the continental drift theory, was first suggested in 1912 by the German scientist Alfred Wegener. The theory, which states that the Earth's surface, or crust, is divided into six to nine major plates that slowly move and change in size, was not widely accepted until the late 1960's. The theory supposes that all the continents were once part of a supercontinent called Pangaea. This theory explains why continents that are now widely separated from each other possess rocks and fossils of the same extinct plants and animals. Geologic events and features such as earthquakes, volcanoes, mountain ranges, ot springs, and geysers also can be explained using plate tectonics.

The slow (1-4 cm per year) movement of tectonic plates causes one of three types of boundaries: divergent boundaries, where plates separate; convergent boundaries, where plates collide; and transform boundaries, where plates slide past each other. The following activity simulates these plate boundaries using a cracked eggshell.



Materials:

3 (or more) hard-boiled eggs
3 (or more) water-based markers

Gently tap the eggs repeatedly on a table while rotating them to produce cracks all around the eggs. Trace along the major cracks with a water-based marker. Gently squeeze the eggs until slight movement of the shell pieces occurs. Look for places where pieces of the eggshell separate. This area represents a divergent boundary. Most divergent boundaries on the Earth are hidden beneath the oceans and are characterized by volcanism, earthquakes, and massive heat flow due to molten rock (magma) rising up from the mantle, which is the thick layer of rock separating the crust from the core at the center of the Earth. The Mid-Atlantic Ridge on the bottom of the Atlantic Ocean is an example of a divergent boundary; here the North American Plate and the Eurasian Plate are separating, causing sea-floor spreading and new oceanic crust to form. Next, look for places where two pieces of eggshell are colliding. This area represents a convergent boundary. Two events can occur when plates converge. If denser oceanic crust collides with lighter continental crust, the oceanic crust will buckle under the continental crust down into the mantle. This process is called subduction and is characterized by earthquakes, rock deformation, and volcanism. The volcanic Cascade Range of the Pacific Northwest was formed by subduction of the Juan de Fuca Plate under the North American Plate. If two equally dense continental crusts collide, both plates will resist being subducted. In this process, the continental crust folds and deforms into a mountain range. The Himalayas are an example of a mountain-building episode which began 25 million years ago and is still occurring today as India travels northward, colliding with Asia. Finally, look for places where one piece of eggshell slides past another. This area represents a transform boundary. The crust is not destroyed here as it is at a convergent boundary, nor is crust created as it is at a divergent boundary. As the two plates slide past each other, earthquakes occur. The San Andreas fault in California is an example of this type of boundary.

 
Dictionaries
Dictionary of Chemical Terms

Look up unfamiliar chemistry terms....

Click on the first letter of the word you would like to look up

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Plasma Dictionary

The Plasma Dictionary is based on the Fusion & Plasma Glossary that was originally created on FusEdWeb, Fusion Energy Educational Website which has additional introductory information on plasma and fusion science .

Click on the first letter of the word you would like to look up

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Planet Dictionary

A planet (from the Greek planete means "wanderer" or more forcefully "vagrant, tramp") is an object in orbit around a star that is not a star in its own right. Much like "continent," "planet" is a word without a precise definition, with history and culture playing as much of a role as geology and astrophysics

Click on the first letter of the word you would like to look up

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Computer Abbreviations Dictionary

Searchable glossary of computer and Internet words, acronyms, and abbreviations.

Click on the first letter of the word you would like to look up

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Dictionary of Chemical Terminology

This is a "living glossary". This means that the glossary may grow every week as individuals submit new entries. This has been set up as a class resource for CEM-181H, the freshmen honors chemistry lecture at Michigan State University.

Click on the first letter of the word you would like to look up

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Dictionary of Commonly Confused Words

The Wrong Word Dictionary : Most Commonly Confused Words · The Words Almost Everyone Confuses and Misuses .

Click on the first letter of the word you would like to look up

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Dictionary of Geology

A science that deals with the history of the earth as recorded in rocks.

Click on the first letter of the word you would like to look up

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
News
  Inspection changes upset heads
  Helping life sciences, improving practices
  The Ontario Curriculum, Grades 1 to 8: Language
  Ontario Prospects 2006: Ontario's Guide to Career Planning
 
Watch Cricket World Cup 2007 Online
United State Schools Information

(You Can browse United States School Name,Address,Email,Telephone No. Director name and many more Information by State and City Wise)

 
 
United State Public Library Information

(You Can browse United States Public Library Name,Address,Email,Telephone No. Director name and many more Information by State and City Wise)

 
 
World Occupational Wages (OWW)

(You Can browse World Occupational Wages Information by Country Wise)

 
 
United State Aircraft registration and Aircraft Reference Information

(Contains the records of all U.S. Civil Aircraft maintained by the FAA, Civil Aviation Registry, Aircraft Registration Branch, AFS-750.)

© 2016 Alcwin.org All rights reserved.
 
Mail.ru