Download Dynamic Earth

Name:__________________________________________________
Date:__________________________________
Miss Bandeira
Period: _______________________________
Dynamic Earth Interactive
http://www.learner.org/interactives/dynamicearth/index.html
Read the Introduction. Click on “Start your exploration with Earths Structure.”
EARTH’S STRUCTURE
List the 3 compositional layers of the earth
a.
b.
c.
Click on “Next Chapter: Plate Tectonics” at the bottom of the diagram.
PLATE TECTONICS
Follow the instructions on the screen.
__________________________________ is the German scientist who came up with the theory of plate tectonic in the
early 1900’s.
Explain the theory of plate tectonics, published by Wegener in 1915.
What 3 pieces of evidence (observations) did he use to support his theory?
a.
b.
c.
Which picture represents Pangaea?
Pangaea began to break apart ____________________________ years ago.
Explain the theory of plate tectonics that we believe today.
What do scientists believe will happen to the continents in about 250 million years from now?
Click on “Continents Over Time” at the bottom of the page and complete the activity.
PLATES & BOUNDARIES
Why are the earth’s continents constantly moving?
There are _______________ major tectonic plates.
What is continental crust?
What is oceanic crust?
Fill in the name of each tectonic plate on the diagram.
A boundary is ____________________________________________________________________________________________________.
A convergent boundary ___________________________________________________________________________________________
______________________________________________________________________________________________________________________.
Draw a picture to show what happens at a convergent boundary.
Based on the examples, use a green colored pencil to outline the convergent boundaries on the map
above.
A divergent boundary ___________________________________________________________________________________________
______________________________________________________________________________________________________________________.
Draw a picture to show what happens at a divergent boundary.
Based on the examples, use a red colored pencil to outline the divergent boundaries on the map above.
A transform boundary ___________________________________________________________________________________________
______________________________________________________________________________________________________________________.
Draw a picture to show what happens at a transform boundary.
Based on the examples, use a blue colored pencil to outline the transform boundaries on the map above.
Click on “Plates & Boundaries Challenge” at the bottom of the page and complete the activity.
SLIP, SLIDE, & COLLIDE
What three natural disasters occur because of the movement of tectonic plates?
1.
2.
3.
Click on “See what happens at different plate boundaries” at the bottom of the page.
***CONVERGENT BOUNDARIES – COLLIDING PLATES
Type 1 - Oceanic plate with Continental Plate
Subduction Zone – when an _______________ _______________ collides with a __________________ _________________.
The oceanic crust bends and get pulled under, or ________________________, beneath the continental crust.
When the oceanic crust sinks, a deep oceanic ___________________, or valley is formed at the edge of the
continent. That crust underground then melts to form ____________________.
Roll your mouse over the word trench on the diagram and define it.
Roll your mouse over the word volcano on the diagram and define it.
Roll your mouse over the word magma on the diagram and define it.
A band of active volcanoes around the Pacific Ocean is called the ___________________________________________.
Type 2 - Oceanic plate with Oceanic plate
What is a tsunami?
Type 3 -Continental plate with Continental plate
What is formed when two continental plates collide?
How are mountains formed?
Roll your mouse over the word mountain on the diagram and define it.
What is an example of a mountain range created at a convergent boundary?
Click on “Next” at the bottom of the page.
***DIVERGENT BOUNDARIES – DIVIDING PLATES
At divergent boundaries, ________________ ________________ are moving ______________ from each other.
Seafloor spreading is
What two things are formed by magma during seafloor spreading?
1.
2.
What is a rift?
As the crust widens and thins, ____________ form in and around the area, as do ________________. Early in the
rift formation, ______________ and ______________ flow into the low valleys and long, narrow ______________ can
be created. Eventually, the widening crust along the boundary may become thin enough that a piece of
the continent breaks off, forming a new _________________. At this point, water from the ocean will rush in,
forming a new ______________ or ______________ basin in the rift zone.
Click on “Play” inside the diagram to see how rifts are formed.
***TRANSFORM BOUNDARIES – SLIDING PLATES
At a transform boundary, tectonic plates _______________ past each other in a _______________ direction.
What is a fault?
Why do earthquakes occur?
A nickname for the transform boundary is the ____________________________________________.
The best-studied transform boundary is __________________________ and it is located in _______________________.
Click on “Plates Interactions Challenge” at the bottom of the page and complete the activity.
When you’re done with this challenge, click on the words final chapter
under your score. Enter your name and complete the test. You can use
your packet to help you. When you are done, call the teacher to
come record your score. DO NOT EXIT THE SCREEN!
Test Score ____________________