Earth’s Interior Web quest
Name ___________________________________________________________________________ Date _____
Introduction
A Web Quest is an internet based activity that will provide you with information that will be useful in class. When
completing this Web Quest you will visit many Web sites that will enhance your knowledge in the areas of the earth's
interior (layers), heat transfer, continental drift and plate tectonics.
Task
This Web Quest is divided into sections. When you come to a link (always in orange), click it. The link will bring you to an
outside Web site that will provide you with information on the above topics. After reading the entire Web page answer
the questions that follow
Part 1: Earth's Interior
Earth is many thousand kilometers in depth. If you could travel deep into the earth's surface you would find that it
contains three main layers; the crust, mantle and core. To learn more about the layers of Earth, click the following links
and answer the questions that follow.
Go to The Earth's Interior Link
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How is Earth's interior like an apple? ____________________________________________________________
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The lithosphere is divided into 2 parts (or crust).
o What are they called? __________________________________________________________________
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o
What is the thickness of each part? _______________________________________________________
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o
What are these parts primarily made of? __________________________________________________
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Click on the Earth’s Layers link. After reading each slide click the "next" button and proceed to read the next slide. When
you have examined all of the slides, complete the questions on the "questions" slide. These questions are also below.
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Name the five layers of the earth in order from the outside to the center of the earth. ____________________
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What causes the mantle to "flow"? ______________________________________________________________
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What are the two main metals that make up the outer and inner core? _________________________________

Describe in your own words how the earth's layers were formed. (Slide 2 will help you.) ___________________
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Part 2: Convection Currents and the Mantle
Heat transfer is the movement of heat from a warmer object to a cooler object. There are three ways in which heat can
be transferred; conduction, convection and/or radiation. Click on the links below and answer the questions that follow.
Click on the Convection, Conduction and Radiation Link & Heat Transfer Link

How is heat transferred by conduction? _________________________________________________________
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Explain the process of convection. ______________________________________________________________
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How is heat transferred by radiation? ___________________________________________________________
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If air is a fluid, why isn't convection responsible for transferring heat to Earth from the sun? _______________
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Test your knowledge! Scroll back to the top of the Heat Transfer Web page and take the "Mini Quiz". Explain how your
did! _____________________________________________________________________________________________
As you already know, the earth's mantle contains two layers; the asthenosphere (tough liquid part of the outer mantle)
and the lithosphere (the stiffer outer mantle and the crust). Because of the intense pressure and temperature in the
mantle convection currents occur. To learn about what influence these convection currents have on Earth, read the Web
page below and answer the questions that follow.
The Mantle Link

Describe how convection currents occur in Earth's mantle. __________________________________________
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What is a constructive force caused by the convection currents in the earth's mantle? ____________________
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What is a destructive force caused by the convection currents in the earth's mantle? _____________________
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Part 3: Drifting Continents
The theory of continental drift originated from a German scientist named Alfred Wegener who proposed that there was
once a super continent called Pangaea ("all lands"). Wegener proposed that over time the continents drifted apart. Read
through the following link to learn about Wegener's theory of continental drift.
Continental Drift Link

What 5 factors did Wegener use to support his theory? _____________________________________________
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List three of the arguments of geologists that disproved Wegener's theory. _____________________________
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Arthur Holmes came up with his own theory of drifting continents in 1928. What was his theory? ___________
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Part 4: Sea-Floor Spreading
The movement of plates caused by convection currents causes both constructive and destructive forces beneath the
ocean floor. To learn more about this topic click on the link below and answer the questions that follow.
Sea-Floor Spreading Link
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What two Earth changing events can occur when the plates underneath the ocean spread?_______________
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What is an ocean ridge? _____________________________________________________________________
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Why are two plates spreading considered to be 'constructive'? ______________________________________
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What is subduction? ________________________________________________________________________
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What is the Mid-Atlantic Ridge? How many miles does it stretch? ____________________________________
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Part 5: The Theory of Plate Tectonics
The theory of plate tectonics was formulated in the 1960s and 1970s when new information was discovered about the
inside of Earth. To learn more, click on the links below, read the Web page and answer the questions that follow.
Plate Tectonics Link

What is the theory of plate tectonics? __________________________________________________________
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What new information led to the theory of plate tectonics? ________________________________________
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About how fast do the plates move in relation to each other each year? _______________________________
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What is it called when two plates meet? ________________________________________________________
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Convergent Boundaries Link
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What are convergent boundaries? _____________________________________________________________
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What occurs when a continental and an oceanic plate collide? _______________________________________
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When an oceanic plate digs into Earth's hot interior, what occurs? ____________________________________
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How were the Andes Mountains in South America formed? __________________________________________
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Divergent Boundaries Link
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What are divergent boundaries? ________________________________________________________________
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Explain how volcanoes form in the central valley of a divergent boundary? ______________________________
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How much does the Atlantic ocean widen per year due to divergent boundaries? _________________________
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Transform Boundaries Link
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What are transform boundaries? ________________________________________________________________
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What could happen to a stream bed that is split by a transform boundary? ____________________________
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Name one of Earth's most famous transform boundaries? Where is it located?
_____________________________
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True or False?
o Due to transforming plates, Los Angeles will break away from California. Explain your answer. ________
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Conclusion
Great job! You have put a lot of hard work into answering the questions above. Now that you have all of this new
knowledge, it is time to demonstrate it. Complete the project explained by Mr. C!