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<title>W04 Friday - Flexibility Review</title>
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<h1>🏅 What Bends, What Breaks? Review</h1>
<h2>Week 4 • Friday • Flexible vs. Rigid Materials</h2>
<h3>📖 Reading Time</h3>
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<p>You have finished four weeks of materials science! You learned to observe like a scientist. You learned about properties like texture and hardness. This week you learned about flexible and rigid materials.</p>
<p>Remember the big ideas. Flexible materials bend without breaking. Rigid materials stay stiff and hold their shape. Pushing too hard on a rigid material can crack or break it. Engineers pick flexible or rigid materials to match the job.</p>
<p>Look around and you will see both everywhere. Your shoes bend when you walk. Your chair stays rigid when you sit. Your world is built from smart material choices. Today you will play a game, take a quiz, and build one last design!</p>
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<h3>✏️ Reading Questions</h3>
<p>1. What do flexible materials do?</p>
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<p>2. What can happen when you push too hard on a rigid material?</p>
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<p>3. Why do your shoes need to bend?</p>
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<p>4. Name one flexible thing and one rigid thing in your room. Tell why each is made that way.</p>
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<h3>📝 Vocabulary Review</h3>
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<div class="vocab-card"><strong>flexible</strong><div class="line-row"></div><div class="line-row"></div></div>
<div class="vocab-card"><strong>rigid</strong><div class="line-row"></div><div class="line-row"></div></div>
<div class="vocab-card"><strong>bend test</strong><div class="line-row"></div><div class="line-row"></div></div>
<div class="vocab-card"><strong>engineer</strong><div class="line-row"></div><div class="line-row"></div></div>
<div class="vocab-card"><strong>property</strong><div class="line-row"></div><div class="line-row"></div></div>
<div class="vocab-card"><strong>material</strong><div class="line-row"></div><div class="line-row"></div></div>
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<h3>🧠 Game: What Bends, What Breaks?</h3>
<p style="font-size:10.5px; color:#555;">Imagine bending each item. Circle BENDS or BREAKS.</p>
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<tr><th>Item</th><th>If you bend it hard, it...</th></tr>
<tr><td>A pipe cleaner</td><td>BENDS / BREAKS</td></tr>
<tr><td>A dry spaghetti noodle</td><td>BENDS / BREAKS</td></tr>
<tr><td>A wet noodle</td><td>BENDS / BREAKS</td></tr>
<tr><td>A thin twig</td><td>BENDS / BREAKS</td></tr>
<tr><td>A rubber eraser</td><td>BENDS / BREAKS</td></tr>
<tr><td>A candy cane</td><td>BENDS / BREAKS</td></tr>
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<h3>✏️ True or False</h3>
<p style="font-size:10.5px; color:#555;">Write T for true or F for false in each circle.</p>
<div class="tf-item"><span class="circle-box"></span> Flexible materials bend without breaking.</div>
<div class="tf-item"><span class="circle-box"></span> A rigid ruler is bendier than a rubber band.</div>
<div class="tf-item"><span class="circle-box"></span> Engineers pick materials to match the job.</div>
<div class="tf-item"><span class="circle-box"></span> Folding paper can make it hold more weight.</div>
<div class="tf-item"><span class="circle-box"></span> Everything in your house is flexible.</div>
<div class="tf-item"><span class="circle-box"></span> A bend test shows if a material is flexible.</div>
<h3>✏️ Fill in the Blanks</h3>
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<span>flexible</span><span>rigid</span><span>engineer</span><span>bend</span><span>observe</span><span>property</span>
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<p>1. A jump rope must be ______________ .</p>
<p>2. A ladder must be ______________ .</p>
<p>3. An ______________ designs and builds things.</p>
<p>4. Flexibility is a ______________ of a material.</p>
<p>5. Scientists ______________ carefully before deciding.</p>
<p>6. Pipe cleaners are easy to ______________ .</p>
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<h3>🧠 Design Challenge: The Most Flexible Structure</h3>
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<p>Build the most flexible structure you can! Use pipe cleaners, straws, paper, or string. It should bend without breaking when you push it. Then draw your design below.</p>
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<p>Materials I used: ______________________________________</p>
<p>When I pushed it, my structure:</p>
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<h3>📓 Science Journal</h3>
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<p>Write today's date in your journal. Then finish these sentences:</p>
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<p>The most fun thing I did in the last four weeks was:</p>
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<h3>📊 Week 4 Review</h3>
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<tr><th>Skill</th><th>How did I do? Circle one</th></tr>
<tr><td>I can tell flexible from rigid.</td><td>GREAT / OK / NEED PRACTICE</td></tr>
<tr><td>I can do a bend test.</td><td>GREAT / OK / NEED PRACTICE</td></tr>
<tr><td>I can build and test a bridge.</td><td>GREAT / OK / NEED PRACTICE</td></tr>
<tr><td>I can pick materials for a job.</td><td>GREAT / OK / NEED PRACTICE</td></tr>
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<h3>🏠 Home Activity</h3>
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<p>Congratulations, materials scientist! Show someone at home your favorite worksheet from the past four weeks. Teach them one thing you learned about materials.</p>
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