<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      width: 100%;
      height: 100%;
      background: #f8fafc;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      user-select: none;
    }

    .diagram-grid {
      display: flex;
      width: 100%;
      max-width: 580px;
      justify-content: center;
      align-items: stretch;
      gap: 16px;
      flex: 1;
    }

    .cell-card {
      flex: 1;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
    }

    .card-title {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      text-align: center;
    }

    .volt-badge {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 6px;
      margin-top: 4px;
    }

    .badge-aa {
      background: #fef3c7;
      color: #b45309;
      border: 1px solid #fde68a;
    }

    .badge-9v {
      background: #e0f2fe;
      color: #0369a1;
      border: 1px solid #bae6fd;
    }

    .battery-stage {
      width: 100%;
      display: flex;
      justify-content: center;
      align-items: center;
      flex: 1;
      min-height: 180px;
    }

    svg {
      overflow: visible;
    }

    .calc-row {
      font-size: 13px;
      font-weight: 600;
      color: #475569;
      background: #f1f5f9;
      padding: 6px 12px;
      border-radius: 8px;
      text-align: center;
      width: 90%;
    }

    .mini-cell {
      cursor: pointer;
      transition: opacity 0.2s ease, filter 0.2s ease;
    }

    .mini-cell:hover {
      filter: brightness(1.1);
    }

    .interactive-hint {
      font-size: 12px;
      color: #64748b;
      margin-top: 6px;
      text-align: center;
    }

    .active-glow {
      filter: drop-shadow(0 0 4px #38bdf8);
    }
  </style>
</head>
<body>

  <div class="diagram-grid">
    
    <div class="cell-card">
      <div style="text-align: center;">
        <div class="card-title">AA Cell</div>
        <span class="volt-badge badge-aa">1.5 V</span>
      </div>

      <div class="battery-stage">
        <svg width="70" height="170" viewBox="0 0 70 170">
          
          <rect x="27" y="4" width="16" height="8" rx="2" fill="#cbd5e1" stroke="#94a3b8" stroke-width="1.5" />
          
          
          <text x="35" y="2" text-anchor="middle" font-size="11" font-weight="bold" fill="#64748b">+</text>

          
          <path d="M 12 12 L 58 12 Q 60 12 60 16 L 60 46 L 10 46 L 10 16 Q 10 12 12 12 Z" fill="url(#goldGrad)" stroke="#b45309" stroke-width="1.5" />
          
          
          <path d="M 10 46 L 60 46 L 60 156 Q 60 160 56 160 L 14 160 Q 10 160 10 156 Z" fill="url(#darkGrad)" stroke="#334155" stroke-width="1.5" />

          
          <rect x="16" y="160" width="38" height="5" rx="1.5" fill="#cbd5e1" stroke="#94a3b8" stroke-width="1.5" />
          <text x="35" y="174" text-anchor="middle" font-size="11" font-weight="bold" fill="#64748b">−</text>

          
          <rect x="18" y="75" width="34" height="38" rx="6" fill="rgba(255,255,255,0.15)" />
          <text x="35" y="93" text-anchor="middle" font-size="11" font-weight="bold" fill="#fbbf24">1 CELL</text>
          <text x="35" y="106" text-anchor="middle" font-size="10" font-weight="600" fill="#f8fafc">1.5 V</text>

          
          <defs>
            <linearGradient id="goldGrad" x1="0" y1="0" x2="1" y2="0">
              <stop offset="0%" stop-color="#f59e0b" />
              <stop offset="50%" stop-color="#fef08a" />
              <stop offset="100%" stop-color="#d97706" />
            </linearGradient>
            <linearGradient id="darkGrad" x1="0" y1="0" x2="1" y2="0">
              <stop offset="0%" stop-color="#1e293b" />
              <stop offset="50%" stop-color="#475569" />
              <stop offset="100%" stop-color="#0f172a" />
            </linearGradient>
          </defs>
        </svg>
      </div>

      <div class="calc-row">1 single cell</div>
    </div>

    
    <div class="cell-card">
      <div style="text-align: center;">
        <div class="card-title">9V Battery (Inside)</div>
        <span class="volt-badge badge-9v" id="liveBadge">6 × 1.5 V = 9.0 V</span>
      </div>

      <div class="battery-stage">
        <svg width="150" height="170" viewBox="0 0 150 170">
          <defs>
            <linearGradient id="miniCellGrad" x1="0" y1="0" x2="1" y2="0">
              <stop offset="0%" stop-color="#38bdf8" />
              <stop offset="50%" stop-color="#bae6fd" />
              <stop offset="100%" stop-color="#0284c7" />
            </linearGradient>
            <linearGradient id="caseGrad" x1="0" y1="0" x2="1" y2="0">
              <stop offset="0%" stop-color="#1e293b" />
              <stop offset="100%" stop-color="#0f172a" />
            </linearGradient>
          </defs>

          
          <rect x="12" y="16" width="126" height="148" rx="8" fill="url(#caseGrad)" stroke="#334155" stroke-width="2" />

          
          <rect x="18" y="44" width="114" height="114" rx="6" fill="#f8fafc" stroke="#94a3b8" stroke-width="1.5" stroke-dasharray="3 3" />

          
          
          <polygon points="34,6 44,6 48,16 30,16" fill="#cbd5e1" stroke="#64748b" stroke-width="1.5" />
          <text x="39" y="4" text-anchor="middle" font-size="10" font-weight="bold" fill="#64748b">−</text>

          
          <rect x="100" y="8" width="16" height="8" rx="3" fill="#cbd5e1" stroke="#64748b" stroke-width="1.5" />
          <text x="108" y="4" text-anchor="middle" font-size="10" font-weight="bold" fill="#64748b">+</text>

          
          
          <path d="M 27 50 L 123 50" stroke="#f59e0b" stroke-width="2" stroke-linecap="round" />
          
          <path d="M 27 150 L 123 150" stroke="#f59e0b" stroke-width="2" stroke-linecap="round" />

          
          <g class="mini-cell" id="c1" onclick="highlightCell(0)">
            <rect x="21" y="52" width="15" height="94" rx="3" fill="url(#miniCellGrad)" stroke="#0369a1" stroke-width="1" />
            <text x="28.5" y="103" text-anchor="middle" font-size="8.5" font-weight="700" fill="#0c4a6e" transform="rotate(-90 28.5 103)">1.5V</text>
          </g>

          
          <g class="mini-cell" id="c2" onclick="highlightCell(1)">
            <rect x="40" y="52" width="15" height="94" rx="3" fill="url(#miniCellGrad)" stroke="#0369a1" stroke-width="1" />
            <text x="47.5" y="103" text-anchor="middle" font-size="8.5" font-weight="700" fill="#0c4a6e" transform="rotate(-90 47.5 103)">1.5V</text>
          </g>

          
          <g class="mini-cell" id="c3" onclick="highlightCell(2)">
            <rect x="59" y="52" width="15" height="94" rx="3" fill="url(#miniCellGrad)" stroke="#0369a1" stroke-width="1" />
            <text x="66.5" y="103" text-anchor="middle" font-size="8.5" font-weight="700" fill="#0c4a6e" transform="rotate(-90 66.5 103)">1.5V</text>
          </g>

          
          <g class="mini-cell" id="c4" onclick="highlightCell(3)">
            <rect x="78" y="52" width="15" height="94" rx="3" fill="url(#miniCellGrad)" stroke="#0369a1" stroke-width="1" />
            <text x="85.5" y="103" text-anchor="middle" font-size="8.5" font-weight="700" fill="#0c4a6e" transform="rotate(-90 85.5 103)">1.5V</text>
          </g>

          
          <g class="mini-cell" id="c5" onclick="highlightCell(4)">
            <rect x="97" y="52" width="15" height="94" rx="3" fill="url(#miniCellGrad)" stroke="#0369a1" stroke-width="1" />
            <text x="104.5" y="103" text-anchor="middle" font-size="8.5" font-weight="700" fill="#0c4a6e" transform="rotate(-90 104.5 103)">1.5V</text>
          </g>

          
          <g class="mini-cell" id="c6" onclick="highlightCell(5)">
            <rect x="116" y="52" width="15" height="94" rx="3" fill="url(#miniCellGrad)" stroke="#0369a1" stroke-width="1" />
            <text x="123.5" y="103" text-anchor="middle" font-size="8.5" font-weight="700" fill="#0c4a6e" transform="rotate(-90 123.5 103)">1.5V</text>
          </g>

          
          <text x="75" y="34" text-anchor="middle" font-size="11" font-weight="bold" fill="#ffffff">9V BLOCK</text>
        </svg>
      </div>

      <div class="calc-row" id="calcText">1.5V × 6 = 9V</div>
    </div>
  </div>

  <div class="interactive-hint">Tap inner cells to count total voltage</div>

  <script>
    const cells = [
      document.getElementById('c1'),
      document.getElementById('c2'),
      document.getElementById('c3'),
      document.getElementById('c4'),
      document.getElementById('c5'),
      document.getElementById('c6')
    ];
    const liveBadge = document.getElementById('liveBadge');
    const calcText = document.getElementById('calcText');

    function highlightCell(index) {
      const activeCount = index + 1;
      const totalVolts = (activeCount * 1.5).toFixed(1).replace('.0', '');

      cells.forEach((cell, i) => {
        if (i <= index) {
          cell.style.opacity = '1';
          cell.querySelector('rect').setAttribute('fill', 'url(#miniCellGrad)');
          cell.querySelector('rect').setAttribute('stroke', '#0284c7');
        } else {
          cell.style.opacity = '0.3';
          cell.querySelector('rect').setAttribute('fill', '#e2e8f0');
          cell.querySelector('rect').setAttribute('stroke', '#94a3b8');
        }
      });

      if (activeCount === 6) {
        liveBadge.textContent = '6 × 1.5 V = 9.0 V';
        calcText.textContent = '1.5V × 6 = 9V';
      } else {
        liveBadge.textContent = activeCount + ' × 1.5 V = ' + totalVolts + ' V';
        calcText.textContent = '1.5V × ' + activeCount + ' = ' + totalVolts + 'V';
      }
    }
  </script>
</body>
</html>

Understanding Voltage and Cell Ratings

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 16px 12px 12px;
      user-select: none;
    }

    /* Shared Voltage Banner */
    .top-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #0284c7;
      color: #ffffff;
      padding: 8px 18px;
      border-radius: 9999px;
      font-weight: 700;
      font-size: 15px;
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
    }
    .top-badge span {
      background: #fef08a;
      color: #854d0e;
      font-size: 11px;
      font-weight: 800;
      padding: 2px 7px;
      border-radius: 6px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    /* Lineup Stage */
    .lineup {
      display: flex;
      align-items: flex-end;
      justify-content: center;
      gap: 16px;
      width: 100%;
      max-width: 480px;
      margin-top: 10px;
      padding-bottom: 8px;
      border-bottom: 3px solid #cbd5e1;
    }

    .battery-col {
      display: flex;
      flex-direction: column;
      align-items: center;
      cursor: pointer;
    }

    .push-indicator {
      font-size: 11px;
      font-weight: 700;
      color: #0284c7;
      margin-bottom: 4px;
      display: flex;
      flex-direction: column;
      align-items: center;
      line-height: 1;
    }
    .push-arrow {
      font-size: 13px;
      color: #0284c7;
    }

    /* Battery Graphic Styling */
    .battery {
      display: flex;
      flex-direction: column;
      align-items: center;
      border-radius: 6px 6px 3px 3px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.12);
      transition: filter 0.2s ease, transform 0.2s ease;
    }
    .battery-col:hover .battery,
    .battery-col.active .battery {
      filter: drop-shadow(0 0 6px rgba(2, 132, 199, 0.6));
    }

    .terminal {
      background: #94a3b8;
      border-radius: 3px 3px 0 0;
      border: 1px solid #64748b;
      border-bottom: none;
    }

    .canister {
      width: 100%;
      flex: 1;
      border-radius: 4px 4px 2px 2px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      border: 1.5px solid #334155;
    }

    .cap-gold {
      background: linear-gradient(90deg, #d97706, #fbbf24, #d97706);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #78350f;
      font-weight: 900;
      font-size: 11px;
    }

    .body-dark {
      background: linear-gradient(90deg, #1e293b, #334155, #1e293b);
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      padding: 2px;
    }

    .bat-name {
      font-weight: 800;
      line-height: 1;
    }
    .bat-volt {
      font-size: 10px;
      font-weight: 600;
      color: #38bdf8;
      margin-top: 2px;
    }

    /* Proportional Dimensions */
    /* AAA */
    .aaa .terminal { width: 10px; height: 5px; }
    .aaa .battery { width: 32px; height: 125px; }
    .aaa .cap-gold { height: 26px; }
    .aaa .bat-name { font-size: 11px; }

    /* AA */
    .aa .terminal { width: 14px; height: 6px; }
    .aa .battery { width: 44px; height: 142px; }
    .aa .cap-gold { height: 30px; }
    .aa .bat-name { font-size: 13px; }

    /* C */
    .c-cell .terminal { width: 22px; height: 7px; }
    .c-cell .battery { width: 68px; height: 140px; }
    .c-cell .cap-gold { height: 30px; }
    .c-cell .bat-name { font-size: 16px; }

    /* D */
    .d-cell .terminal { width: 28px; height: 8px; }
    .d-cell .battery { width: 94px; height: 172px; }
    .d-cell .cap-gold { height: 36px; }
    .d-cell .bat-name { font-size: 20px; }

    /* Bottom Callout */
    .callout-wrapper {
      display: flex;
      justify-content: flex-end;
      width: 100%;
      max-width: 480px;
      margin-top: 6px;
      padding-right: 4px;
    }
    .callout {
      background: #ffffff;
      border: 2px solid #f59e0b;
      border-radius: 12px;
      padding: 8px 14px;
      font-size: 12px;
      font-weight: 700;
      color: #92400e;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      box-shadow: 0 3px 8px rgba(245, 158, 11, 0.15);
      position: relative;
    }
    .callout::before {
      content: "";
      position: absolute;
      top: -8px;
      right: 44px;
      border-left: 7px solid transparent;
      border-right: 7px solid transparent;
      border-bottom: 8px solid #f59e0b;
    }
    .callout::after {
      content: "";
      position: absolute;
      top: -5px;
      right: 45px;
      border-left: 6px solid transparent;
      border-right: 6px solid transparent;
      border-bottom: 6px solid #ffffff;
    }
  </style>
</head>
<body>

  
  <div class="top-badge">
    ⚡ All 1.5 Volts <span>Same Push</span>
  </div>

  
  <div class="lineup">
    
    <div class="battery-col aaa">
      <div class="push-indicator">
        <span class="push-arrow">▲</span>
        <span>1.5 V</span>
      </div>
      <div class="battery">
        <div class="terminal"></div>
        <div class="canister">
          <div class="cap-gold">+</div>
          <div class="body-dark">
            <div class="bat-name">AAA</div>
            <div class="bat-volt">1.5V</div>
          </div>
        </div>
      </div>
    </div>

    
    <div class="battery-col aa">
      <div class="push-indicator">
        <span class="push-arrow">▲</span>
        <span>1.5 V</span>
      </div>
      <div class="battery">
        <div class="terminal"></div>
        <div class="canister">
          <div class="cap-gold">+</div>
          <div class="body-dark">
            <div class="bat-name">AA</div>
            <div class="bat-volt">1.5V</div>
          </div>
        </div>
      </div>
    </div>

    
    <div class="battery-col c-cell">
      <div class="push-indicator">
        <span class="push-arrow">▲</span>
        <span>1.5 V</span>
      </div>
      <div class="battery">
        <div class="terminal"></div>
        <div class="canister">
          <div class="cap-gold">+</div>
          <div class="body-dark">
            <div class="bat-name">C</div>
            <div class="bat-volt">1.5V</div>
          </div>
        </div>
      </div>
    </div>

    
    <div class="battery-col d-cell active">
      <div class="push-indicator">
        <span class="push-arrow">▲</span>
        <span>1.5 V</span>
      </div>
      <div class="battery">
        <div class="terminal"></div>
        <div class="canister">
          <div class="cap-gold">+</div>
          <div class="body-dark">
            <div class="bat-name">D</div>
            <div class="bat-volt">1.5V</div>
          </div>
        </div>
      </div>
    </div>
  </div>

  
  <div class="callout-wrapper">
    <div class="callout">
      🔋 More fuel inside = lasts longer, same push!
    </div>
  </div>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      width: 100%;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 6px;
    }

    .grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      width: 100%;
      max-width: 540px;
    }

    .slide-card {
      background: #ffffff;
      border: 2px solid #e2e8f0;
      border-radius: 12px;
      padding: 8px 8px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
      box-shadow: 0 2px 6px rgba(30, 41, 69, 0.06);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 3px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 2px;
    }

    .badge-15v {
      background: #00b4d8;
    }

    .badge-9v {
      background: #f77f00;
    }

    .label {
      font-size: 12px;
      font-weight: 700;
      color: #1e2945;
      margin-bottom: 2px;
      text-align: center;
    }

    .svg-container {
      width: 100%;
      max-width: 210px;
      aspect-ratio: 200 / 145;
      margin: 0 auto;
    }

    svg {
      width: 100%;
      height: 100%;
      display: block;
      overflow: visible;
    }

    .status-tag {
      margin-top: 4px;
      font-size: 11px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      padding: 3px 10px;
      border-radius: 6px;
      line-height: 1.2;
    }

    .status-cyan {
      background: #e0f2fe;
      color: #0077b6;
    }

    .status-orange {
      background: #ffedd5;
      color: #c2410c;
    }

    @media (max-width: 420px) {
      body {
        padding: 4px;
      }
      .grid {
        grid-template-columns: 1fr;
        gap: 8px;
        max-width: 280px;
      }
      .slide-card {
        padding: 6px 6px 8px;
      }
      .svg-container {
        max-width: 180px;
      }
    }
  </style>
</head>
<body>

  <div class="grid">
    
    <div class="slide-card">
      <div class="badge badge-15v">1.5V</div>
      <div class="label">Gentle Push</div>
      <div class="svg-container">
        <svg viewBox="0 0 200 145">
          <defs>
            <linearGradient id="grad15" x1="0%" y1="0%" x2="100%" y2="100%">
              <stop offset="0%" stop-color="#90e0ef" />
              <stop offset="100%" stop-color="#00b4d8" />
            </linearGradient>
            <filter id="glow15" x="-20%" y="-20%" width="140%" height="140%">
              <feDropShadow dx="0" dy="1" stdDeviation="1.5" flood-color="#00b4d8" flood-opacity="0.4"/>
            </filter>
          </defs>

          
          <line x1="10" y1="135" x2="190" y2="135" stroke="#cbd5e1" stroke-width="3" stroke-linecap="round" />

          
          <rect x="20" y="75" width="22" height="60" rx="3" fill="#f1f5f9" stroke="#94a3b8" stroke-width="2" />
          <line x1="20" y1="95" x2="42" y2="95" stroke="#94a3b8" stroke-width="1.5" />
          <line x1="20" y1="115" x2="42" y2="115" stroke="#94a3b8" stroke-width="1.5" />

          
          <line x1="12" y1="75" x2="12" y2="135" stroke="#00b4d8" stroke-width="2" stroke-dasharray="2 2" />
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      <div class="status-tag status-cyan">Slow Flow</div>
    </div>

    
    <div class="slide-card">
      <div class="badge badge-9v">9V</div>
      <div class="label">Strong Push</div>
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      <div class="status-tag status-orange">Fast Flow</div>
    </div>
  </div>

</body>
</html>

science.ks3.y2.t5.s1

Aligned learning resources

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