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Activity Title: Page 1
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http://www.atomicarchive.com/Fusion/Fusion1.shtml
Click on this link to "Fusion Animation"
http://www.atomicarchive.com/Fusion/FusionMov.shtml
http://image.absoluteastronomy.com/images/encyclopediaimages/n/nu/nucleosynthesis_in_a_star.gif
Click on this link to view "How Elements are Formed"
and answer the following questions.
It may help to shrink this page to view the video clip and worksheet simultaneously.
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<link type="text/css" href="chemStyles.css" rel="stylesheet">
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<p class="pagetitle">
<strong>An Overview of Chemical Elements </strong>
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<img width="14" src="topNavBarLeftMargin.jpg" height="26">
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<img width="54" src="page.jpg" height="26">
<a href="index.cml"><font><img width="46" border="0" src="index.jpg" height="26">
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<img src="chargeMainIdea.png" height="58" width="98">
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<p class="subhead">
What elements are most abundant...
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...in the universe?
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<font size="5">Hydrogen, which is composed of a single proton and
a single electron, is the simplest and most abundant element in
the universe. It makes up about 75% of all matter! Helium makes up
most of the remaining 25%. Oxygen is the third most abundant
element in the universe. All of the other elements are relatively
rare. </font>
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<font size="2">http://chemistry.about.com/cs/howthingswork/f/blabundant.htm</font>
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Why is hydrogen considered the simplest element?
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How do you think hydrogen's structure contributes to its abundance in
the universe?
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List the three most abundant elements and their relative amounts in the
universe.
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Which of the following describes the fusion of hydrogen in the sun as
represented in the animation?
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<html><sup>3</sup>H and <sup>2</sup>H fuse to form <sup>4</sup>He and a neutron</html>
<html><sup>4</sup>He and a neutron fuse to form <sup>3</sup>H and <sup>2</sup>H</html> form <sup>4</sup>He and a neutron</html>
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<img src="Supernovasized2.jpg">
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<p>
</p>
<font size="5">Hydrogen is the raw fuel that most stars 'burn' to
produce energy by combining light elements into heavier elements in
a process known as fusion. It is generally believed that most of the
elements in the universe heavier than helium are created in stars
when lighter nuclei fuse to make heavier nuclei at very high
temperatures, around 5 million degrees. Elements with more protons
in their nuclei require still higher temperatures. Most of the heavy
elements, from oxygen up through iron, are thought to be produced in
stars that contain at least ten times as much matter as our Sun. </font><font size="2">http://helios.gsfc.nasa.gov/nucleo.html</font>
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Stars are referred to as the "ultimate alchemists." What is meant by
this statement?
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Stars begin their life with what elements at what approximate
percentages?
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What is the explanation provided in the video for how and why heavier
elements form? Include the process through oxygen.
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Why are carbon, nitrogen and oxygen so important?
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</body>
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What is the result of the fusion of carbon?
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What element is considered the "end of the road"? Why is this the case
in terms of nuclear fusion?
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In three or four sentences, describe what happens to a star at this
stage of its life and how does this impact element formation?
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</body>
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What is meant by the statement "We are all stardust?"
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<img width="14" src="topNavBarLeftMargin.jpg" height="26">
<a href="index.cml"><font><img width="60" border="0" src="prev.jpg" height="26">
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<img width="54" src="page.jpg" height="26">
<a href="index.cml"><font><img width="46" border="0" src="index.jpg" height="26">
</font></a><font><a href="page1.cml"><img width="28" border="0" src="page1Selected.jpg" height="26">
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