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<h1>🔬 Air Bubble Experiments</h1>
<h2>Week 9 — Wednesday | Proving Air Takes Up Space</h2>
<h3>📖 Reading Time</h3>
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<p>Today we become air scientists! We will do two experiments that show air is real matter. In the first one, we will blow up a balloon without touching it. In the second, we will trap air under water using a cup.</p>
<p>When baking soda and vinegar mix, they make a gas called carbon dioxide. The gas needs space, so it pushes up into the balloon. The balloon grows without any breath from you!</p>
<p>In the cup experiment, we push a cup straight down into water. A paper towel inside stays dry. Why? Air is trapped in the cup. The air takes up space, so the water cannot get in!</p>
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<h3>✏️ Quick Questions</h3>
<p><strong>1. What gas is made when baking soda mixes with vinegar?</strong></p>
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<p><strong>2. Why does the paper towel in the cup stay dry?</strong></p>
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<h3>⚠️ Safety First</h3>
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<p><strong>Adult supervision needed!</strong> A grown-up must help with the baking soda and vinegar. Do not taste or drink the mixture. Keep it away from your eyes. Wipe up spills right away.</p>
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<h3>🔬 Experiment 1: Balloon Blow-Up</h3>
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<p><strong>You need:</strong> Empty bottle, balloon, 3 spoons of baking soda, half a cup of vinegar, a funnel.</p>
<p><strong>Steps:</strong></p>
<p>1. Pour the vinegar into the bottle.</p>
<p>2. Use the funnel to put baking soda inside the balloon.</p>
<p>3. Stretch the balloon over the bottle top. Do not spill the soda yet!</p>
<p>4. Lift the balloon so the baking soda falls into the vinegar.</p>
<p>5. Watch what happens to the balloon!</p>
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<p><strong>My prediction before the experiment:</strong></p>
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<h3>📊 Experiment 1 Observations</h3>
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<tr><th>Question</th><th>What I Saw</th></tr>
<tr><td>What happened when the powders mixed?</td><td style="height:30px"></td></tr>
<tr><td>What did the balloon do?</td><td style="height:30px"></td></tr>
<tr><td>Did anyone blow into the balloon?</td><td style="height:30px"></td></tr>
<tr><td>What filled the balloon?</td><td style="height:30px"></td></tr>
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<h3>🔬 Experiment 2: Dry Paper Under Water</h3>
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<p><strong>You need:</strong> A clear cup, a paper towel, a big bowl of water.</p>
<p><strong>Steps:</strong></p>
<p>1. Crumple the paper towel and push it into the bottom of the cup.</p>
<p>2. Turn the cup upside down. The towel must not fall out.</p>
<p>3. Push the cup straight down into the water. Keep it very straight!</p>
<p>4. Pull the cup straight back up and check the towel.</p>
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<h3>📊 Experiment 2 Observations</h3>
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<tr><th>Question</th><th>What I Saw</th></tr>
<tr><td>Was the paper towel wet or dry?</td><td style="height:30px"></td></tr>
<tr><td>What kept the water out of the cup?</td><td style="height:30px"></td></tr>
<tr><td>What happened if you tipped the cup?</td><td style="height:30px"></td></tr>
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<h3>🎨 Drawing</h3>
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<p style="font-size:10px; text-align:center;"><strong>Balloon before</strong></p>
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<p style="font-size:10px; text-align:center;"><strong>Balloon after</strong></p>
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<p style="font-size:10px; text-align:center;"><strong>Air trapped in the cup</strong></p>
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<h3>✏️ Extended Writing</h3>
<p><strong>Both experiments proved that air and gases take up space. Explain how each experiment showed this. Use full sentences.</strong></p>
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<h3>🧠 Design Challenge</h3>
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<p><strong>Challenge:</strong> Design a boat that uses trapped air to float. Draw your boat and label where the air is trapped.</p>
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<p><strong>Why will your boat float?</strong></p>
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<h3>📓 Science Journal</h3>
<p><strong>1. What surprised you most today?</strong></p>
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<p><strong>2. What question do you still have about air or gases?</strong></p>
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<p><strong>3. Rate today's experiments: circle one.</strong></p>
<p><span class="circle-box"></span> Awesome <span class="circle-box"></span> Good <span class="circle-box"></span> Okay</p>
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