<!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">
  <title>Volume Derivation</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #ffffff;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 12px 16px;
      user-select: none;
    }

    .header-formula {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-size: 15px;
      font-weight: 700;
      color: #1e2945;
      background: #f1f5f9;
      padding: 6px 14px;
      border-radius: 20px;
    }

    .formula-highlight {
      color: #0096c7;
    }

    .diagram-area {
      position: relative;
      width: 100%;
      max-width: 540px;
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 8px 0;
    }

    svg {
      width: 100%;
      height: auto;
      max-height: 280px;
      overflow: visible;
    }

    .cube-face {
      transition: fill 0.3s ease, stroke 0.3s ease, opacity 0.3s ease;
    }

    .interactive-btn-group {
      display: flex;
      gap: 8px;
      width: 100%;
      max-width: 480px;
      justify-content: center;
    }

    .scale-btn {
      flex: 1;
      padding: 8px 6px;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #1e2945;
      border-radius: 8px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
      transition: all 0.2s ease;
    }

    .scale-btn .sub {
      font-size: 11px;
      font-weight: 500;
      color: #64748b;
    }

    .scale-btn.active {
      background: #e0f2fe;
      border-color: #00b4d8;
      color: #0369a1;
      box-shadow: 0 0 0 1px #00b4d8;
    }

    .scale-btn.active .sub {
      color: #0284c7;
    }

    .label-tag {
      font-size: 12px;
      font-weight: 700;
      fill: #1e2945;
    }

    .sub-tag {
      font-size: 10.5px;
      font-weight: 500;
      fill: #64748b;
    }

    .accent-tag {
      fill: #0096c7;
      font-weight: 700;
    }
  </style>
</head>
<body>

  <div class="header-formula">
    <span>Volume</span>
    <span>=</span>
    <span>m × m × m</span>
    <span>=</span>
    <span class="formula-highlight">1 m³</span>
  </div>

  <div class="diagram-area">
    <svg viewBox="0 0 540 280">
      <defs>
        <marker id="arrow" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
          <path d="M 0 1 L 10 5 L 0 9 z" fill="#00b4d8"/>
        </marker>
        <marker id="arrow-sm" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="5" markerHeight="5" orient="auto-start-reverse">
          <path d="M 0 1 L 10 5 L 0 9 z" fill="#f59e0b"/>
        </marker>
      </defs>

      
      <g id="grp-m3" transform="translate(130, 150)">
        
        <polygon id="m3-top" class="cube-face" points="0,-90 78,-45 0,0 -78,-45" fill="#f8fafc" stroke="#94a3b8" stroke-width="1.5" stroke-linejoin="round"/>
        
        <polygon id="m3-left" class="cube-face" points="-78,-45 0,0 0,90 -78,45" fill="#e2e8f0" stroke="#94a3b8" stroke-width="1.5" stroke-linejoin="round"/>
        
        <polygon id="m3-right" class="cube-face" points="0,0 78,-45 78,45 0,90" fill="#cbd5e1" stroke="#94a3b8" stroke-width="1.5" stroke-linejoin="round"/>

        
        <path d="M-62.4,-36 L-62.4,54 M-46.8,-27 L-46.8,63 M-31.2,-18 L-31.2,72 M-15.6,-9 L-15.6,81" stroke="#94a3b8" stroke-width="0.75" stroke-dasharray="2 2" opacity="0.6"/>
        <path d="M15.6,-9 L15.6,81 M31.2,-18 L31.2,72 M46.8,-27 L46.8,63 M62.4,-36 L62.4,54" stroke="#94a3b8" stroke-width="0.75" stroke-dasharray="2 2" opacity="0.6"/>

        
        <text x="-56" y="76" class="sub-tag">1 m</text>
        <text x="45" y="76" class="sub-tag">1 m</text>
        <text x="84" y="0" class="sub-tag">1 m</text>

        
        <polygon id="corner-top" class="cube-face" points="0,-90 7.8,-85.5 0,-81 -7.8,-85.5" fill="#00b4d8" stroke="#0077b6" stroke-width="1"/>
        <polygon id="corner-left" class="cube-face" points="-7.8,-85.5 0,-81 0,-72 -7.8,-76.5" fill="#0096c7" stroke="#0077b6" stroke-width="1"/>
        <polygon id="corner-right" class="cube-face" points="0,-81 7.8,-85.5 7.8,-76.5 0,-72" fill="#48cae4" stroke="#0077b6" stroke-width="1"/>
      </g>

      
      <g id="lbl-m3" transform="translate(130, 260)">
        <text x="0" y="0" text-anchor="middle" class="label-tag">1 m³ (Cubic Meter)</text>
        <text x="0" y="14" text-anchor="middle" class="sub-tag">= 1,000 Liters</text>
      </g>

      
      <path id="arr-to-l" d="M 130 60 Q 200 40 250 85" fill="none" stroke="#00b4d8" stroke-width="2" stroke-dasharray="4 3" marker-end="url(#arrow)"/>

      
      <g id="grp-liter" transform="translate(305, 120)">
        
        <polygon id="l-top" class="cube-face" points="0,-40 38,-18 0,4 -38,-18" fill="#e0f2fe" stroke="#0096c7" stroke-width="1.5" stroke-linejoin="round"/>
        
        <polygon id="l-left" class="cube-face" points="-38,-18 0,4 0,48 -38,26" fill="#bae6fd" stroke="#0096c7" stroke-width="1.5" stroke-linejoin="round"/>
        
        <polygon id="l-right" class="cube-face" points="0,4 38,-18 38,26 0,48" fill="#7dd3fc" stroke="#0096c7" stroke-width="1.5" stroke-linejoin="round"/>

        
        <text x="-32" y="38" class="accent-tag" font-size="10">10 cm</text>
        <text x="16" y="38" class="accent-tag" font-size="10">10 cm</text>

        
        <polygon id="ml-corner-top" class="cube-face" points="0,-40 3.8,-37.8 0,-35.6 -3.8,-37.8" fill="#f59e0b" stroke="#d97706" stroke-width="0.8"/>
        <polygon id="ml-corner-left" class="cube-face" points="-3.8,-37.8 0,-35.6 0,-31.2 -3.8,-33.4" fill="#d97706" stroke="#b45309" stroke-width="0.8"/>
        <polygon id="ml-corner-right" class="cube-face" points="0,-35.6 3.8,-37.8 3.8,-33.4 0,-31.2" fill="#fbbf24" stroke="#d97706" stroke-width="0.8"/>
      </g>

      
      <g id="lbl-l" transform="translate(305, 190)">
        <text x="0" y="0" text-anchor="middle" class="label-tag accent-tag">1 Liter (L)</text>
        <text x="0" y="14" text-anchor="middle" class="sub-tag">= 1 dm³ = 0.001 m³</text>
      </g>

      
      <path id="arr-to-ml" d="M 305 78 Q 375 60 430 115" fill="none" stroke="#f59e0b" stroke-width="2" stroke-dasharray="4 3" marker-end="url(#arrow-sm)"/>

      
      <g id="grp-ml" transform="translate(465, 140)">
        
        <polygon id="ml-top" class="cube-face" points="0,-16 16,-7 0,2 -16,-7" fill="#fef3c7" stroke="#d97706" stroke-width="1.5" stroke-linejoin="round"/>
        
        <polygon id="ml-left" class="cube-face" points="-16,-7 0,2 0,20 -16,11" fill="#fde68a" stroke="#d97706" stroke-width="1.5" stroke-linejoin="round"/>
        
        <polygon id="ml-right" class="cube-face" points="0,2 16,-7 16,11 0,20" fill="#fcd34d" stroke="#d97706" stroke-width="1.5" stroke-linejoin="round"/>

        
        <text x="-18" y="24" fill="#b45309" font-size="9.5" font-weight="700">1 cm</text>
      </g>

      
      <g id="lbl-ml" transform="translate(465, 190)">
        <text x="0" y="0" text-anchor="middle" class="label-tag" fill="#b45309">1 mL</text>
        <text x="0" y="14" text-anchor="middle" class="sub-tag">= 1 cm³ = 0.001 L</text>
      </g>
    </svg>
  </div>

  <div class="interactive-btn-group">
    <button class="scale-btn active" data-scale="all">
      <span>Overview</span>
      <span class="sub">All Scales</span>
    </button>
    <button class="scale-btn" data-scale="m3">
      <span>1 m³</span>
      <span class="sub">1,000 L</span>
    </button>
    <button class="scale-btn" data-scale="liter">
      <span>1 L</span>
      <span class="sub">1 dm³</span>
    </button>
    <button class="scale-btn" data-scale="ml">
      <span>1 mL</span>
      <span class="sub">1 cm³</span>
    </button>
  </div>

  <script>
    const buttons = document.querySelectorAll('.scale-btn');
    const grpM3 = document.getElementById('grp-m3');
    const grpLiter = document.getElementById('grp-liter');
    const grpMl = document.getElementById('grp-ml');
    const lblM3 = document.getElementById('lbl-m3');
    const lblL = document.getElementById('lbl-l');
    const lblMl = document.getElementById('lbl-ml');
    const arrToL = document.getElementById('arr-to-l');
    const arrToMl = document.getElementById('arr-to-ml');

    function setHighlight(scale) {
      // Reset opacities & highlights
      const allElements = [
        { el: grpM3, lbl: lblM3 },
        { el: grpLiter, lbl: lblL },
        { el: grpMl, lbl: lblMl }
      ];

      if (scale === 'all') {
        allElements.forEach(item => {
          item.el.style.opacity = '1';
          item.lbl.style.opacity = '1';
        });
        arrToL.style.opacity = '1';
        arrToMl.style.opacity = '1';
      } else if (scale === 'm3') {
        grpM3.style.opacity = '1';
        lblM3.style.opacity = '1';
        grpLiter.style.opacity = '0.25';
        lblL.style.opacity = '0.25';
        grpMl.style.opacity = '0.25';
        lblMl.style.opacity = '0.25';
        arrToL.style.opacity = '0.2';
        arrToMl.style.opacity = '0.2';
      } else if (scale === 'liter') {
        grpM3.style.opacity = '0.35';
        lblM3.style.opacity = '0.35';
        grpLiter.style.opacity = '1';
        lblL.style.opacity = '1';
        grpMl.style.opacity = '0.25';
        lblMl.style.opacity = '0.25';
        arrToL.style.opacity = '1';
        arrToMl.style.opacity = '0.2';
      } else if (scale === 'ml') {
        grpM3.style.opacity = '0.25';
        lblM3.style.opacity = '0.25';
        grpLiter.style.opacity = '0.35';
        lblL.style.opacity = '0.35';
        grpMl.style.opacity = '1';
        lblMl.style.opacity = '1';
        arrToL.style.opacity = '0.2';
        arrToMl.style.opacity = '1';
      }
    }

    buttons.forEach(btn => {
      btn.addEventListener('click', () => {
        buttons.forEach(b => b.classList.remove('active'));
        btn.classList.add('active');
        setHighlight(btn.dataset.scale);
      });
    });
  </script>
</body>
</html>

SI Base and Derived Units in Scientific Measurement

<!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">
  <title>Force vs. Electric Potential Units</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      color: #1e2945;
      background: #ffffff;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      padding: 12px;
      min-height: 100%;
    }
    .cards-container {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      width: 100%;
      max-width: 600px;
    }
    @media (max-width: 380px) {
      .cards-container {
        grid-template-columns: 1fr;
        gap: 10px;
      }
    }
    .unit-card {
      background: #ffffff;
      border: 1px solid #e6e6e6;
      border-radius: 12px;
      padding: 14px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
      position: relative;
    }
    .card-title {
      font-size: 15px;
      font-weight: 700;
      color: #1e2945;
      margin-bottom: 4px;
    }
    .unit-badge {
      display: inline-block;
      background: #f0f7ff;
      color: #0284c7;
      font-weight: 700;
      font-size: 14px;
      padding: 3px 10px;
      border-radius: 6px;
      margin-bottom: 8px;
      border: 1px solid #bae6fd;
    }
    .derivation-box {
      font-size: 13px;
      color: #475569;
      font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 6px;
      padding: 4px 8px;
      width: 100%;
      margin-bottom: 12px;
      font-weight: 600;
    }
    .visual-stage {
      width: 100%;
      height: 120px;
      background: #fafafa;
      border: 1px dashed #e2e8f0;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
    }
    svg {
      width: 100%;
      height: 100%;
      display: block;
    }
    .lcd-text {
      font-family: "SFMono-Regular", Consolas, monospace;
      font-size: 11px;
      font-weight: 700;
      fill: #0f172a;
    }
    .label-tag {
      font-size: 10px;
      font-weight: 700;
      fill: #0284c7;
    }
  </style>
</head>
<body>
  <div class="cards-container">
    
    <div class="unit-card">
      <div class="card-title">Force</div>
      <div class="unit-badge">Newton (N)</div>
      <div class="derivation-box">kg · m / s²</div>
      <div class="visual-stage">
        <svg viewBox="0 0 200 110" preserveAspectRatio="xMidYMid meet">
          
          <line x1="10" y1="92" x2="190" y2="92" stroke="#cbd5e1" stroke-width="2" stroke-dasharray="4 3" />
          
          
          <rect x="25" y="52" width="60" height="28" rx="4" fill="#38bdf8" stroke="#0284c7" stroke-width="1.5" />
          <circle cx="40" cy="85" r="7" fill="#64748b" stroke="#334155" stroke-width="1.5" />
          <circle cx="70" cy="85" r="7" fill="#64748b" stroke="#334155" stroke-width="1.5" />
          <circle cx="40" cy="85" r="2.5" fill="#f8fafc" />
          <circle cx="70" cy="85" r="2.5" fill="#f8fafc" />
          <text x="55" y="70" text-anchor="middle" font-size="9" font-weight="700" fill="#ffffff">CART</text>

          
          <circle cx="88" cy="66" r="3" fill="none" stroke="#475569" stroke-width="1.5" />
          
          
          <path d="M 88 66 L 98 66" stroke="#475569" stroke-width="2" fill="none" />

          
          <rect x="98" y="48" width="55" height="36" rx="4" fill="#f1f5f9" stroke="#94a3b8" stroke-width="1.5" />
          <rect x="104" y="54" width="43" height="18" rx="2" fill="#e2e8f0" stroke="#cbd5e1" stroke-width="1" />
          <text x="125.5" y="67" text-anchor="middle" class="lcd-text">5.2 N</text>
          <text x="125.5" y="80" text-anchor="middle" font-size="6" font-weight="700" fill="#64748b">SENSOR</text>

          
          <defs>
            <marker id="arrow" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
              <path d="M 0 1.5 L 8 5 L 0 8.5 z" fill="#0284c7" />
            </marker>
          </defs>
          <line x1="153" y1="66" x2="185" y2="66" stroke="#0284c7" stroke-width="2.5" marker-end="url(#arrow)" />
          <text x="170" y="58" text-anchor="middle" class="label-tag">PULL</text>
        </svg>
      </div>
    </div>

    
    <div class="unit-card">
      <div class="card-title">Electric Potential</div>
      <div class="unit-badge">Volt (V)</div>
      <div class="derivation-box">J / C</div>
      <div class="visual-stage">
        <svg viewBox="0 0 200 110" preserveAspectRatio="xMidYMid meet">
          
          <rect x="22" y="44" width="46" height="52" rx="4" fill="#334155" stroke="#1e293b" stroke-width="1.5" />
          
          <rect x="28" y="38" width="10" height="6" rx="1" fill="#94a3b8" stroke="#64748b" stroke-width="1" />
          <rect x="52" y="38" width="10" height="6" rx="1" fill="#94a3b8" stroke="#64748b" stroke-width="1" />
          <text x="33" y="56" text-anchor="middle" font-size="9" font-weight="700" fill="#f87171">+</text>
          <text x="57" y="56" text-anchor="middle" font-size="10" font-weight="700" fill="#94a3b8">−</text>
          <text x="45" y="80" text-anchor="middle" font-size="8" font-weight="700" fill="#ffffff">9V</text>

          
          <rect x="120" y="24" width="58" height="74" rx="6" fill="#f8fafc" stroke="#64748b" stroke-width="1.5" />
          
          <rect x="127" y="30" width="44" height="22" rx="3" fill="#e2e8f0" stroke="#cbd5e1" stroke-width="1" />
          <text x="149" y="45.5" text-anchor="middle" class="lcd-text">9.0 V</text>
          
          <circle cx="149" cy="68" r="10" fill="#cbd5e1" stroke="#94a3b8" stroke-width="1.5" />
          <line x1="149" y1="68" x2="149" y2="60" stroke="#0284c7" stroke-width="2" stroke-linecap="round" />
          
          <circle cx="138" cy="88" r="2.5" fill="#ef4444" />
          <circle cx="160" cy="88" r="2.5" fill="#1e293b" />

          
          
          <path d="M 138 88 C 120 112, 50 15, 33 37" fill="none" stroke="#ef4444" stroke-width="1.5" stroke-linecap="round" />
          
          <path d="M 160 88 C 145 118, 70 20, 57 37" fill="none" stroke="#334155" stroke-width="1.5" stroke-linecap="round" />

          
          <rect x="31.5" y="31" width="3" height="7" fill="#ef4444" rx="1" />
          <rect x="55.5" y="31" width="3" height="7" fill="#334155" rx="1" />
        </svg>
      </div>
    </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">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      width: 100%;
      min-height: 100%;
      background: #ffffff;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      color: #1e2945;
      padding: 14px 10px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 12px;
    }

    .grid-layout {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      width: 100%;
      max-width: 680px;
      margin: 0 auto;
    }

    @media (max-width: 520px) {
      .grid-layout {
        grid-template-columns: 1fr;
        gap: 10px;
      }
    }

    .unit-card {
      background: #ffffff;
      border: 1px solid #e6e6e6;
      border-radius: 12px;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      position: relative;
      transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
      user-select: none;
    }

    .unit-card:hover {
      box-shadow: 0 4px 12px rgba(30, 41, 69, 0.08);
    }

    .unit-card.active {
      border-color: #22b7ff;
      box-shadow: 0 0 0 2px rgba(34, 183, 255, 0.25), 0 4px 12px rgba(30, 41, 69, 0.08);
    }

    .badge {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      padding: 3px 8px;
      border-radius: 6px;
      margin-bottom: 6px;
    }

    .badge-blue {
      background: #e0f2fe;
      color: #0369a1;
    }

    .badge-green {
      background: #dcfce7;
      color: #15803d;
    }

    .badge-purple {
      background: #f3e8ff;
      color: #7e22ce;
    }

    .unit-title {
      font-size: 16px;
      font-weight: 700;
      color: #1e2945;
      margin-bottom: 8px;
    }

    .unit-symbol {
      color: #64748b;
      font-weight: 600;
    }

    .icon-box {
      width: 100%;
      height: 76px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #f8fafc;
      border-radius: 8px;
      margin-bottom: 10px;
    }

    svg {
      display: block;
    }

    .benchmark {
      font-size: 12px;
      font-weight: 600;
      color: #475569;
      background: #f1f5f9;
      padding: 6px 8px;
      border-radius: 6px;
      width: 100%;
      line-height: 1.35;
    }

    .interactive-hint {
      text-align: center;
      font-size: 11px;
      font-weight: 600;
      color: #94a3b8;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
  </style>
</head>
<body>

  <div class="grid-layout">
    
    <div class="unit-card active" onclick="selectCard(this)">
      <span class="badge badge-blue">Length</span>
      <div class="unit-title">Meter <span class="unit-symbol">(m)</span></div>
      <div class="icon-box">
        <svg width="120" height="48" viewBox="0 0 120 48" fill="none">
          
          <rect x="10" y="16" width="100" height="16" rx="3" fill="#cbd5e1" />
          <line x1="20" y1="16" x2="20" y2="24" stroke="#475569" stroke-width="1.5" />
          <line x1="30" y1="16" x2="30" y2="21" stroke="#475569" stroke-width="1" />
          <line x1="40" y1="16" x2="40" y2="24" stroke="#475569" stroke-width="1.5" />
          <line x1="50" y1="16" x2="50" y2="21" stroke="#475569" stroke-width="1" />
          <line x1="60" y1="16" x2="60" y2="24" stroke="#475569" stroke-width="1.5" />
          <line x1="70" y1="16" x2="70" y2="21" stroke="#475569" stroke-width="1" />
          <line x1="80" y1="16" x2="80" y2="24" stroke="#475569" stroke-width="1.5" />
          <line x1="90" y1="16" x2="90" y2="21" stroke="#475569" stroke-width="1" />
          <line x1="100" y1="16" x2="100" y2="24" stroke="#475569" stroke-width="1.5" />
          
          <rect x="52" y="8" width="28" height="32" rx="4" fill="#0284c7" />
          <rect x="56" y="14" width="20" height="10" rx="2" fill="#ffffff" />
          <text x="66" y="22" font-size="7" font-weight="700" fill="#0284c7" text-anchor="middle">1.00 m</text>
        </svg>
      </div>
      <div class="benchmark">1 pace ≈ 1 m</div>
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    <div class="unit-card" onclick="selectCard(this)">
      <span class="badge badge-green">Mass</span>
      <div class="unit-title">Kilogram <span class="unit-symbol">(kg)</span></div>
      <div class="icon-box">
        <svg width="120" height="48" viewBox="0 0 120 48" fill="none">
          
          <rect x="25" y="32" width="70" height="12" rx="3" fill="#94a3b8" />
          <rect x="42" y="35" width="36" height="7" rx="2" fill="#1e2945" />
          <text x="60" y="41" font-size="6.5" font-weight="700" fill="#4ade80" text-anchor="middle">1.000 kg</text>
          
          <rect x="35" y="29" width="50" height="3" rx="1" fill="#64748b" />
          <rect x="47" y="10" width="26" height="19" rx="2" fill="#bae6fd" stroke="#0284c7" stroke-width="1.5" />
          <path d="M48 18 Q 60 16 72 18 L 72 28 L 48 28 Z" fill="#38bdf8" />
          <line x1="51" y1="14" x2="55" y2="14" stroke="#0284c7" stroke-width="1" />
          <line x1="51" y1="18" x2="57" y2="18" stroke="#0284c7" stroke-width="1" />
          <line x1="51" y1="22" x2="55" y2="22" stroke="#0284c7" stroke-width="1" />
        </svg>
      </div>
      <div class="benchmark">1 L water ≈ 1 kg</div>
    </div>

    
    <div class="unit-card" onclick="selectCard(this)">
      <span class="badge badge-purple">Temperature</span>
      <div class="unit-title">Kelvin <span class="unit-symbol">(K)</span></div>
      <div class="icon-box">
        <svg width="120" height="48" viewBox="0 0 120 48" fill="none">
          
          <rect x="25" y="12" width="46" height="24" rx="4" fill="#a855f7" />
          <rect x="30" y="16" width="36" height="16" rx="2" fill="#ffffff" />
          <text x="48" y="28" font-size="8" font-weight="700" fill="#7e22ce" text-anchor="middle">273.15 K</text>
          <path d="M71 24 L102 24" stroke="#64748b" stroke-width="3" stroke-linecap="round" />
          <path d="M102 24 L108 24" stroke="#94a3b8" stroke-width="1.5" stroke-linecap="round" />
        </svg>
      </div>
      <div class="benchmark">0 K = Abs Zero<br>273.15 K = Freezing</div>
    </div>
  </div>

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Evaluating Model Size, Scale, Properties, and Materials

Mapping Earthquakes and Volcanoes to Plate Boundaries

Analyzing Earthquake Data for Patterns

Modeling Plate Boundary Interactions

Predicting Geological Hazards From Plate Boundary Data

Planning an Investigation: Modeling Plate Movements

science

Investigating Plate Tectonics

Measuring Length, Mass, and Liquid Volume with Precision

Measuring Temperature, Force, and Electrical Quantities

Acquiring Data with Digital Probes and Data Loggers

Recording Qualitative and Quantitative Laboratory Observations

Precision SI Measurement and Sensor Data Acquisition

Using Published Computational Models of Earth System Relationships

Mapping Human Activities to Changes in Earth System Relationships

Modeling the Relationship Between Resource Use and Biodiversity

Evaluating Solutions That Reduce Human Impacts on Natural Systems

Safety Practices for Water Quality Field Investigations

Designing Solutions for Water Pollution

Evaluating Costs and Benefits of Water Solutions

Modeling and Designing Solutions for Water Systems

What Are Trophic Levels?

Producers, Consumers, and Decomposers in Food Chains

Energy Flow Through Trophic Levels

Diagramming Energy Flow in Food Webs

Building Energy Pyramids

The Ten Percent Rule in Energy Transfer

Calculating Energy Available at Each Trophic Level

Modeling Energy Flow Among Trophic Levels

Revising Explanations Using Population Data

Collecting Quantitative and Qualitative Data in Ecosystem Studies

Energy Flow in Ecosystems

El Sistema Internacional de Unidades: magnitudes fundamentales

Magnitudes derivadas: volumen, densidad, fuerza y presión

Manejo de balanzas analíticas y granatarias

Medición de volumen de líquidos con probetas, pipetas y buretas

Uso del calibrador vernier y tornillo micrométrico

Termometría y sensores digitales de temperatura

Cronometría y fotopuertas en cinemática

Medición de fuerza con dinamómetros

Uso de instrumentos y magnitudes en el laboratorio

Cifras significativas y redondeo en mediciones

Notación científica y prefijos del SI

Factores de conversión y análisis dimensional

Selección justificada de instrumentos según la escala del objeto

Tratamiento de datos y selección de escalas

Registro fidedigno en bitácoras y cuadernos de campo

Diseño de tablas de datos con encabezados y unidades

Elaboración de esquemas rotulados y diagramas anatómicos

Construcción de gráficos de dispersión y líneas de tendencia

Gráficos de barras, histogramas y diagramas circulares

Cálculo de medidas de tendencia central en ciencias

Cálculo de medidas de dispersión: rango y desviación media

Registro y representación estadística de datos experimentales

How the Nervous System Controls Movement

Body System Homeostasis and Regulation

How Body Systems Work Together

Modeling Human Body System Functions

Using Petri Dishes and Dissecting Kits

Human Body System Interactions and Lab Investigations

Determinación de la pendiente y su significado físico

Modelación mediante ecuaciones lineales y proporcionalidad directa

Modelación de relaciones inversas y cuadráticas

Interpolación y extrapolación en gráficas científicas

Uso de hojas de cálculo para el análisis de datos

Modelación matemática y análisis avanzado de datos

Choosing Equipment for Precise Measurement

Testing Electrical Conductivity with a Simple Circuit

Recording Data With Digital Tools

Using Digital Models and Simulations to Test Ideas

Conducting Investigations: Equipment and Digital Tools

Characteristics of the Bacteria Kingdom

Characteristics of the Protist Kingdom

Characteristics of the Fungi Kingdom

Characteristics of the Plant Kingdom

Characteristics of the Animal Kingdom

Importance of Each Kingdom in Ecosystems

Using Microscopes to Study Organisms

Comparing Kingdoms Using Models

The Kingdoms of Life

Observación microscópica de la mitosis y fases celulares

Indagación sobre la respiración celular y fermentación en levaduras

Extracción y análisis de ADN de tejidos vegetales

Análisis de árboles genealógicos y patrones de herencia

Simulación de selección natural y variación de frecuencias alélicas

Análisis de evidencias fósiles y anatomía comparada

Muestreo de biodiversidad con transectos y cuadrantes

Modelación de los ciclos del carbono y nitrógeno

Impacto de especies invasoras en ecosistemas locales

Adaptaciones fisiológicas en biomas colombianos

Síntesis y formulación de nuevas preguntas en biología evolutiva

Indagación en ciencias de la vida, genética y evolución

Conservación de la masa en sistemas cerrados y abiertos

Determinación experimental de la ley de Hooke

Verificación experimental de la segunda ley de Newton

Transferencia de calor: conducción, convección y radiación

Estudio experimental de ondas sonoras: tono, timbre e intensidad

Refracción de la luz y cálculo del índice de refracción

Clasificación de reacciones químicas y evidencias de transformación

El ciclo de las rocas y escalas de tiempo geológico

Análisis de datos meteorológicos y patrones climáticos

Modelación astronómica: sistema solar, fases lunares y eclipses

Integración de competencias científicas hacia la educación media

Indagación en física, química y sistemas terrestres

OGS.9.SEP.3

OGS.9.SEP.3

Aligned learning resources

Related diagrams