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  <id>8435</id>
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&lt;mdoxml version=&quot;1.0&quot;&gt;&lt;p&gt; &lt;/p&gt;
&lt;h3&gt;&lt;strong&gt;Welcome to the Physical World collection of stemNRICH resources.&lt;/strong&gt;&lt;/h3&gt;
&lt;p&gt;&lt;mdo:image src=&quot;headerimage.png&quot; style=&quot;float: right;&quot;&gt;&lt;/mdo:image&gt;&lt;/p&gt;
&lt;p&gt;In these resources, maths is used as a tool to explore some aspect of the physical sciences.  Some might be best used in the maths lesson, with reference made to the science.  Others could be taught as cross-curricular topics. &lt;/p&gt;
&lt;p&gt;&lt;br&gt;&lt;/br&gt;
Stage 3 is roughly 11-14 years and Stage 4 roughly 14-16 years. The stars indicate how easily most learners can get into the problem, although most problems contain enough depth to challenge and stimulate all.&lt;/p&gt;
&lt;p&gt;&lt;br&gt;&lt;/br&gt;
&lt;em&gt;Back to &lt;a href=&quot;http://nrich.maths.org/stemnrich&quot;&gt;main STEM pages&lt;/a&gt;&lt;/em&gt;.&lt;br&gt;&lt;/br&gt;
 &lt;/p&gt;&lt;/mdoxml&gt;</indexXML>
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&lt;mdoxml version=&quot;1.0&quot;&gt;Image from http://commons.wikimedia.org/wiki/File:The_Solar_Cycle_XRay_hi.jpg It is public domain.&lt;/mdoxml&gt;</canonXML>
  <end_user_role>2</end_user_role>
  <difficulty>3</difficulty>
  <keystage1>0</keystage1>
  <keystage2>0</keystage2>
  <keystage3>1</keystage3>
  <keystage4>1</keystage4>
  <keystage4plus>0</keystage4plus>
  <title>\stemNRICH Physical World Header</title>
  <description></description>
</resource>