<?xml version="1.0" encoding="UTF-8"?>
<quiz>
  <question type="matching">
    <name>
      <text>28.1.3.8 contours of scalar fields</text>
    </name>
    <questiontext format="html">
      <text><![CDATA[<p>Describe the contours for the following scalar fields</p>]]></text>
    </questiontext>
    <generalfeedback format="html">
      <text/>
    </generalfeedback>
    <defaultgrade>1</defaultgrade>
    <penalty>0.3333333</penalty>
    <hidden>0</hidden>
    <idnumber/>
    <shuffleanswers>true</shuffleanswers>
    <correctfeedback format="html">
      <text><![CDATA[<p>Your answer is correct.</p>]]></text>
    </correctfeedback>
    <partiallycorrectfeedback format="html">
      <text><![CDATA[<p>Your answer is partially correct.</p>]]></text>
    </partiallycorrectfeedback>
    <incorrectfeedback format="html">
      <text><![CDATA[<p>Your answer is incorrect.</p>]]></text>
    </incorrectfeedback>
    <shownumcorrect/>
    <subquestion format="html">
      <text><![CDATA[<p>\(\phi = y-x\)</p>]]></text>
      <answer>
        <text>Straight lines of gradient 1</text>
      </answer>
    </subquestion>
    <subquestion format="html">
      <text><![CDATA[<p>\(\phi = x^2+y^2\)</p>]]></text>
      <answer>
        <text>Circles centred at the origin</text>
      </answer>
    </subquestion>
    <subquestion format="html">
      <text><![CDATA[<p>\(\phi = y - x^2\)</p>]]></text>
      <answer>
        <text>Parabolas y = x² + c</text>
      </answer>
    </subquestion>
    <subquestion format="html">
      <text/>
      <answer>
        <text>Straight lines of gradient -1</text>
      </answer>
    </subquestion>
    <subquestion format="html">
      <text/>
      <answer>
        <text>Cubics y = x³ + c</text>
      </answer>
    </subquestion>
    <subquestion format="html">
      <text/>
      <answer>
        <text>Circles centred around (1,1)</text>
      </answer>
    </subquestion>
  </question>
</quiz>
