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Tutoring abilities

Look outside your window! You might see green trees, fluttering butterflies, warm sunshine, and cool puddles of water.

Everything you see in nature fits into two big groups: things that are alive, and things that are not.

What makes something alive? Let's meet our first group!

**Biotic factors** are all the living parts of nature, like tall trees, fuzzy rabbits, and buzzing bees.

You can tell something is alive because it grows, needs food and water, breathes, and makes new baby plants or animals.

<!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>Characteristics of Living Things</title>
  <script src="{{VENDOR_CDN}}/classace-diagram.js"></script>
  <style>
    :root {
      --primary: #4caf50;
      --primary-light: #e8f5e9;
      --text: #1e2945;
      --border: #e2e8f0;
      --bg: #f8f9fa;
      --card-bg: #ffffff;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    }

    body {
      background: var(--bg);
      color: var(--text);
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
    }

    .nav-tabs {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      justify-content: center;
      width: 100%;
      max-width: 480px;
      margin-bottom: 10px;
    }

    .tab-btn {
      flex: 1 1 calc(50% - 6px);
      min-width: 120px;
      padding: 8px 12px;
      background: var(--card-bg);
      border: 2px solid var(--border);
      border-radius: 12px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
      transition: all 0.25s ease;
    }

    .tab-btn.active {
      background: var(--primary-light);
      border-color: var(--primary);
      color: #2e7d32;
      box-shadow: 0 0 0 1px var(--primary);
    }

    .stage-container {
      position: relative;
      width: 100%;
      max-width: 480px;
      height: 240px;
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    }

    .stage {
      position: absolute;
      inset: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }

    .stage.active {
      opacity: 1;
      pointer-events: auto;
    }

    /* Scene 1: Grows */
    .grow-box {
      display: flex;
      align-items: flex-end;
      justify-content: center;
      gap: 20px;
      height: 140px;
    }

    .grow-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      transition: transform 0.4s ease;
    }

    .sprout-1 { font-size: 26px; }
    .sprout-2 { font-size: 48px; }
    .sprout-3 { font-size: 72px; }

    .arrow {
      font-size: 20px;
      color: #94a3b8;
      margin-bottom: 24px;
    }

    /* Scene 2: Eats & Drinks */
    .eat-box {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 24px;
    }

    .creature {
      font-size: 72px;
      animation: gentle-bob 2.5s ease-in-out infinite;
    }

    .needs-col {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .need-item {
      display: flex;
      align-items: center;
      gap: 8px;
      background: #f1f5f9;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 15px;
      font-weight: 600;
    }

    .need-item span {
      font-size: 24px;
    }

    /* Scene 3: Breathes */
    .breathe-box {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 24px;
    }

    .lung-creature {
      font-size: 76px;
      animation: breathe 3s ease-in-out infinite;
    }

    .air-flow {
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 28px;
    }

    .air-particle {
      animation: drift 2s ease-in-out infinite alternate;
    }

    .air-particle:nth-child(2) {
      animation-delay: 0.6s;
    }

    /* Scene 4: Makes Young */
    .reproduce-box {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
    }

    .parent {
      font-size: 68px;
    }

    .baby-group {
      display: flex;
      gap: 8px;
    }

    .baby {
      font-size: 38px;
      animation: hop 1.8s ease-in-out infinite alternate;
    }

    .baby:nth-child(2) {
      animation-delay: 0.4s;
    }

    /* Controls */
    .controls {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      margin-top: 10px;
    }

    .btn-ctrl {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 50%;
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 14px;
      color: var(--text);
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    }

    .dots {
      display: flex;
      gap: 6px;
    }

    .dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--border);
      cursor: pointer;
      transition: background 0.2s ease;
    }

    .dot.active {
      background: var(--primary);
    }

    /* Keyframes */
    @keyframes gentle-bob {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
    }

    @keyframes breathe {
      0%, 100% { transform: scale(0.96); }
      50% { transform: scale(1.06); }
    }

    @keyframes drift {
      0% { transform: translateX(0); opacity: 0.4; }
      100% { transform: translateX(10px); opacity: 1; }
    }

    @keyframes hop {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }
  </style>
</head>
<body>

  <div class="nav-tabs">
    <button class="tab-btn active" id="tab0">🌱 Grows</button>
    <button class="tab-btn" id="tab1">💧 Eats & Drinks</button>
    <button class="tab-btn" id="tab2">💨 Breathes</button>
    <button class="tab-btn" id="tab3">🐣 Makes Young</button>
  </div>

  <div class="stage-container">
    
    <div class="stage active" id="stage0">
      <div class="grow-box">
        <div class="grow-item sprout-1">🌱</div>
        <div class="arrow">→</div>
        <div class="grow-item sprout-2">🌿</div>
        <div class="arrow">→</div>
        <div class="grow-item sprout-3">🌳</div>
      </div>
    </div>

    
    <div class="stage" id="stage1">
      <div class="eat-box">
        <div class="creature">🦌</div>
        <div class="needs-col">
          <div class="need-item"><span>🍎</span> Food</div>
          <div class="need-item"><span>💧</span> Water</div>
        </div>
      </div>
    </div>

    
    <div class="stage" id="stage2">
      <div class="breathe-box">
        <div class="lung-creature">🫁</div>
        <div class="air-flow">
          <div class="air-particle">💨 <span>O₂</span></div>
          <div class="air-particle">💨 <span>Air</span></div>
        </div>
      </div>
    </div>

    
    <div class="stage" id="stage3">
      <div class="reproduce-box">
        <div class="parent">🦆</div>
        <div class="arrow">→</div>
        <div class="baby-group">
          <div class="baby">🐥</div>
          <div class="baby">🐥</div>
        </div>
      </div>
    </div>
  </div>

  <div class="controls">
    <button class="btn-ctrl" id="prevBtn" aria-label="Previous">◀</button>
    <div class="dots">
      <div class="dot active" id="dot0"></div>
      <div class="dot" id="dot1"></div>
      <div class="dot" id="dot2"></div>
      <div class="dot" id="dot3"></div>
    </div>
    <button class="btn-ctrl" id="nextBtn" aria-label="Next">▶</button>
  </div>

  <script>
    const tabs = [$('#tab0'), $('#tab1'), $('#tab2'), $('#tab3')];
    const stages = [$('#stage0'), $('#stage1'), $('#stage2'), $('#stage3')];
    const dots = [$('#dot0'), $('#dot1'), $('#dot2'), $('#dot3')];

    const player = new StepPlayer('.stage', {
      interval: 3500,
      onChange: (index) => {
        tabs.forEach((tab, i) => tab.classList.toggle('active', i === index));
        dots.forEach((dot, i) => dot.classList.toggle('active', i === index));
        stages.forEach((st, i) => st.classList.toggle('active', i === index));
      }
    });

    tabs.forEach((tab, i) => {
      onTap(tab, () => {
        player.pause();
        player.goTo(i);
      });
    });

    dots.forEach((dot, i) => {
      onTap(dot, () => {
        player.pause();
        player.goTo(i);
      });
    });

    onTap($('#prevBtn'), () => {
      player.pause();
      player.prev();
    });

    onTap($('#nextBtn'), () => {
      player.pause();
      player.next();
    });

    player.start();
  </script>
</body>
</html>

What about things that do not eat or grow, like rocks and sunshine?

**Abiotic factors** are all the nonliving parts of nature that were never alive.

Bright sunlight, fresh air, cool water, dark soil, and hard rocks are all abiotic factors.

<!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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
      padding: 12px;
      user-select: none;
    }

    .nav-bar {
      display: flex;
      gap: 6px;
      margin-bottom: 12px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .tab-btn {
      background: #f1f5f9;
      border: 2px solid transparent;
      border-radius: 20px;
      padding: 6px 14px;
      font-size: 14px;
      font-weight: 600;
      color: #475569;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 5px;
      transition: all 0.25s ease;
    }

    .tab-btn.active {
      background: #e1f5fe;
      border-color: #22b7ff;
      color: #0369a1;
      box-shadow: 0 2px 8px rgba(34, 183, 255, 0.2);
    }

    .stage {
      width: 100%;
      max-width: 540px;
      height: 260px;
      position: relative;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
    }

    .col {
      flex: 1;
      height: 100%;
      border-radius: 16px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-around;
      padding: 12px 8px;
      transition: background 0.3s ease;
    }

    .col-abiotic {
      background: #e1f5fe;
    }

    .col-biotic {
      background: #e8f5e9;
    }

    .col-title {
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      opacity: 0.85;
    }

    .col-abiotic .col-title { color: #0284c7; }
    .col-biotic .col-title { color: #2e7d32; }

    .item-card {
      width: 100%;
      max-width: 150px;
      background: #ffffff;
      border-radius: 12px;
      padding: 8px 10px;
      display: flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.04);
      transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
      opacity: 0.45;
    }

    .item-card.highlight {
      opacity: 1;
      box-shadow: 0 4px 12px rgba(0,0,0,0.12);
      transform: scale(1.04);
    }

    .col-abiotic .item-card.highlight {
      outline: 2px solid #0284c7;
    }

    .col-biotic .item-card.highlight {
      outline: 2px solid #2e7d32;
    }

    .icon {
      font-size: 24px;
      line-height: 1;
    }

    .label {
      font-size: 14px;
      font-weight: 600;
      white-space: nowrap;
    }

    .connector-area {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
    }

    .action-badge {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: #ffffff;
      padding: 6px 14px;
      border-radius: 20px;
      border: 2px solid #22b7ff;
      box-shadow: 0 4px 10px rgba(0,0,0,0.08);
      font-size: 13px;
      font-weight: 700;
      color: #1e2945;
      display: flex;
      align-items: center;
      gap: 6px;
      z-index: 10;
      transition: all 0.3s ease;
    }

    svg {
      width: 100%;
      height: 100%;
    }

    .flow-line {
      stroke-dasharray: 6;
      animation: dash 1s linear infinite;
    }

    @keyframes dash {
      to {
        stroke-dashoffset: -12;
      }
    }
  </style>
</head>
<body>

  <div class="nav-bar">
    <button class="tab-btn active" onclick="setStep(0)">☀️ Sunlight</button>
    <button class="tab-btn" onclick="setStep(1)">💧 Water</button>
    <button class="tab-btn" onclick="setStep(2)">💨 Air</button>
    <button class="tab-btn" onclick="setStep(3)">🌱 Soil</button>
  </div>

  <div class="stage">
    
    <div class="col col-abiotic">
      <div class="col-title">Abiotic</div>
      <div class="item-card" id="a-0">
        <span class="icon">☀️</span>
        <span class="label">Sunlight</span>
      </div>
      <div class="item-card" id="a-1">
        <span class="icon">💧</span>
        <span class="label">Water</span>
      </div>
      <div class="item-card" id="a-2">
        <span class="icon">💨</span>
        <span class="label">Air</span>
      </div>
      <div class="item-card" id="a-3">
        <span class="icon">🪨</span>
        <span class="label">Soil</span>
      </div>
    </div>

    
    <div class="action-badge" id="badge">
      <span>→</span>
      <span id="badge-text">Energy</span>
      <span>→</span>
    </div>

    
    <div class="connector-area">
      <svg id="svg-layer">
        <line id="flow-line" class="flow-line" stroke="#22b7ff" stroke-width="3" stroke-linecap="round" />
      </svg>
    </div>

    
    <div class="col col-biotic">
      <div class="col-title">Biotic</div>
      <div class="item-card" id="b-0">
        <span class="icon">🌻</span>
        <span class="label">Plant</span>
      </div>
      <div class="item-card" id="b-1">
        <span class="icon">🦌</span>
        <span class="label">Deer</span>
      </div>
      <div class="item-card" id="b-2">
        <span class="icon">🦅</span>
        <span class="label">Bird</span>
      </div>
      <div class="item-card" id="b-3">
        <span class="icon">🌳</span>
        <span class="label">Tree</span>
      </div>
    </div>
  </div>

  <script>
    const data = [
      { text: "Light Energy", from: 0, to: 0 },
      { text: "Hydration",    from: 1, to: 1 },
      { text: "Respiration",  from: 2, to: 2 },
      { text: "Nutrients",    from: 3, to: 3 }
    ];

    let current = 0;
    let timer = null;

    function updateView() {
      // Highlight tabs
      document.querySelectorAll('.tab-btn').forEach((btn, i) => {
        btn.classList.toggle('active', i === current);
      });

      // Highlight cards
      for (let i = 0; i < 4; i++) {
        document.getElementById(`a-${i}`).classList.toggle('highlight', i === data[current].from);
        document.getElementById(`b-${i}`).classList.toggle('highlight', i === data[current].to);
      }

      // Update badge text
      document.getElementById('badge-text').textContent = data[current].text;

      // Update connector line
      const stageRect = document.querySelector('.stage').getBoundingClientRect();
      const elFrom = document.getElementById(`a-${data[current].from}`).getBoundingClientRect();
      const elTo = document.getElementById(`b-${data[current].to}`).getBoundingClientRect();

      const line = document.getElementById('flow-line');
      const x1 = elFrom.right - stageRect.left;
      const y1 = elFrom.top + elFrom.height / 2 - stageRect.top;
      const x2 = elTo.left - stageRect.left;
      const y2 = elTo.top + elTo.height / 2 - stageRect.top;

      line.setAttribute('x1', x1);
      line.setAttribute('y1', y1);
      line.setAttribute('x2', x2);
      line.setAttribute('y2', y2);
    }

    function setStep(index) {
      current = index;
      updateView();
      resetTimer();
    }

    function autoStep() {
      current = (current + 1) % data.length;
      updateView();
    }

    function resetTimer() {
      clearInterval(timer);
      timer = setInterval(autoStep, 3200);
    }

    window.addEventListener('resize', updateView);
    window.addEventListener('load', () => {
      updateView();
      resetTimer();
    });
  </script>
</body>
</html>

What happens when living things meet nonliving things in the wild?

## How Living and Nonliving Things Interact

An **interaction** happens whenever two things connect, touch, or help each other.

Living things cannot survive alone — they must use nonliving things every single day to stay alive.

<!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>Interactions: Living & Nonliving</title>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      min-height: 100%;
      user-select: none;
      padding: 8px;
    }

    /* Tab Buttons */
    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      justify-content: center;
      width: 100%;
      max-width: 540px;
      margin-bottom: 6px;
      z-index: 10;
    }

    .btn {
      appearance: none;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #334155;
      padding: 6px 12px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 20px;
      cursor: pointer;
      box-shadow: 0 1px 2px rgba(0,0,0,0.05);
      transition: background 0.2s, color 0.2s, box-shadow 0.2s, border-color 0.2s;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .btn.active {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
      box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.25);
    }

    /* Scene Container */
    .scene-wrap {
      position: relative;
      width: 100%;
      max-width: 540px;
      aspect-ratio: 4 / 3;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
      background: #e0f2fe;
    }

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

    /* Flow Animations */
    .flow-line {
      fill: none;
      stroke-width: 3.5;
      stroke-linecap: round;
      stroke-dasharray: 6 6;
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .flow-sun { stroke: #f59e0b; animation: dashMove 1.2s linear infinite; }
    .flow-air { stroke: #64748b; animation: dashMove 1.6s linear infinite; }
    .flow-water { stroke: #0284c7; animation: dashMove 1.4s linear infinite; }
    .flow-soil { stroke: #84cc16; animation: dashReverse 1.5s linear infinite; }

    @keyframes dashMove {
      to { stroke-dashoffset: -24; }
    }
    @keyframes dashReverse {
      to { stroke-dashoffset: 24; }
    }

    /* Glow highlights */
    .highlight-ring {
      fill: none;
      stroke-width: 3;
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    /* Active visibility states */
    [data-active="sun"] .is-sun,
    [data-active="air"] .is-air,
    [data-active="water"] .is-water,
    [data-active="soil"] .is-soil,
    [data-active="all"] .flow-line,
    [data-active="all"] .highlight-ring {
      opacity: 1;
    }

    /* Floating Badges inside SVG */
    .tag {
      font-size: 11px;
      font-weight: 700;
      fill: #1e293b;
      letter-spacing: 0.2px;
    }
    .tag-bg {
      fill: rgba(255, 255, 255, 0.88);
      rx: 5;
    }
  </style>
</head>
<body>

  
  <div class="controls" id="btnGroup">
    <button class="btn active" data-mode="all">✦ All</button>
    <button class="btn" data-mode="sun">☀️ Sun</button>
    <button class="btn" data-mode="air">💨 Air</button>
    <button class="btn" data-mode="water">💧 Water</button>
    <button class="btn" data-mode="soil">🌱 Soil</button>
  </div>

  
  <div class="scene-wrap" id="scene" data-active="all">
    <svg viewBox="0 0 400 300">
      <defs>
        
        <linearGradient id="skyGrad" x1="0%" y1="0%" x2="0%" y2="100%">
          <stop offset="0%" stop-color="#bae6fd" />
          <stop offset="65%" stop-color="#e0f2fe" />
          <stop offset="100%" stop-color="#f0fdf4" />
        </linearGradient>

        
        <linearGradient id="waterGrad" x1="0%" y1="0%" x2="100%" y2="0%">
          <stop offset="0%" stop-color="#38bdf8" />
          <stop offset="100%" stop-color="#0284c7" />
        </linearGradient>

        
        <linearGradient id="soilGrad" x1="0%" y1="0%" x2="0%" y2="100%">
          <stop offset="0%" stop-color="#854d0e" />
          <stop offset="100%" stop-color="#543310" />
        </linearGradient>
      </defs>

      
      <rect width="400" height="300" fill="url(#skyGrad)" />

      
      <g id="sunGroup">
        <circle cx="55" cy="50" r="26" fill="#fef08a" opacity="0.45" />
        <circle cx="55" cy="50" r="18" fill="#f59e0b" />
        <circle class="highlight-ring is-sun" cx="55" cy="50" r="24" stroke="#f59e0b" />
        
        <path d="M55 24 v-6 M55 76 v6 M29 50 h-6 M81 50 h6 M36 31 l-4 -4 M74 69 l4 4 M36 69 l-4 4 M74 31 l4 -4" stroke="#f59e0b" stroke-width="2.5" stroke-linecap="round" />
      </g>

      
      <g id="airGroup">
        <path d="M 285 45 q 15 -10 30 0 q 15 -8 28 4 h -58 z" fill="#ffffff" opacity="0.85" />
        <path d="M 250 58 c 12 -4 24 -4 35 0 M 265 65 c 10 -3 20 -3 30 0" stroke="#94a3b8" stroke-width="2" stroke-linecap="round" fill="none" />
      </g>

      
      <path d="M -20 220 Q 90 160 210 200 Q 320 235 420 180 L 420 300 L -20 300 Z" fill="#4ade80" />
      <path d="M 120 210 Q 230 165 420 200 L 420 300 L 120 300 Z" fill="#22c55e" opacity="0.85" />

      
      <path d="M -10 245 Q 120 240 240 248 L 240 300 L -10 300 Z" fill="url(#soilGrad)" />

      
      <path d="M 105 240 Q 95 260 85 275 M 105 240 Q 110 265 115 285 M 105 245 Q 125 260 135 272" stroke="#fef08a" stroke-width="2" stroke-linecap="round" fill="none" opacity="0.9" />

      
      <path d="M 240 248 Q 320 240 410 255 L 410 300 L 240 300 Z" fill="url(#waterGrad)" />
      
      <ellipse cx="325" cy="265" rx="45" ry="8" fill="#e0f2fe" opacity="0.4" />

      
      <g id="plant">
        
        <path d="M 105 242 Q 102 195 105 140" stroke="#15803d" stroke-width="5" stroke-linecap="round" fill="none" />
        
        <path d="M 104 195 Q 75 185 70 175 Q 85 195 104 198" fill="#16a34a" />
        <path d="M 105 170 Q 135 160 140 150 Q 125 170 105 173" fill="#16a34a" />
        
        <circle cx="105" cy="135" r="16" fill="#facc15" />
        <circle cx="105" cy="135" r="9" fill="#78350f" />
      </g>

      
      <g id="rabbit" transform="translate(180, 175)">
        
        <ellipse cx="25" cy="30" rx="16" ry="12" fill="#e2e8f0" />
        
        <circle cx="14" cy="20" r="9" fill="#e2e8f0" />
        
        <ellipse cx="11" cy="9" rx="3" ry="8" fill="#fbcfe8" stroke="#cbd5e1" stroke-width="1.5" />
        <ellipse cx="17" cy="10" rx="3" ry="7" fill="#fbcfe8" stroke="#cbd5e1" stroke-width="1.5" />
        
        <circle cx="11" cy="19" r="1.5" fill="#0f172a" />
        
        <circle cx="41" cy="28" r="4" fill="#ffffff" />
      </g>

      
      <g id="fish" transform="translate(310, 266)">
        <ellipse cx="0" cy="0" rx="10" ry="5" fill="#fb923c" />
        <polygon points="-9,0 -15,-4 -15,4" fill="#fb923c" />
        <circle cx="5" cy="-1" r="1.2" fill="#0f172a" />
      </g>

      

      
      <path class="flow-line flow-sun is-sun" d="M 70 65 Q 90 95 102 125" />
      <path class="flow-line flow-sun is-sun" d="M 72 58 Q 130 90 190 180" />

      
      <path class="flow-line flow-air is-air" d="M 260 70 Q 180 90 115 140" />
      <path class="flow-line flow-air is-air" d="M 265 75 Q 230 115 205 178" />

      
      <path class="flow-line flow-water is-water" d="M 285 255 Q 245 235 210 212" />
      <path class="flow-line flow-water is-water" d="M 240 265 Q 180 270 130 265" />

      
      <path class="flow-line flow-soil is-soil" d="M 65 280 Q 90 265 105 240" />
      <path class="flow-line flow-soil is-soil" d="M 145 280 Q 125 260 106 240" />

      
      
      <rect class="tag-bg" x="30" y="8" width="50" height="18" />
      <text class="tag" x="36" y="21">☀️ Sun</text>

      
      <rect class="tag-bg" x="320" y="32" width="46" height="18" />
      <text class="tag" x="326" y="45">💨 Air</text>

      
      <rect class="tag-bg" x="330" y="222" width="58" height="18" />
      <text class="tag" x="336" y="235">💧 Water</text>

      
      <rect class="tag-bg" x="20" y="255" width="48" height="18" />
      <text class="tag" x="26" y="268">🌱 Soil</text>

    </svg>
  </div>

  <script>
    const scene = document.getElementById('scene');
    const buttons = document.querySelectorAll('#btnGroup .btn');

    buttons.forEach(btn => {
      btn.addEventListener('click', () => {
        buttons.forEach(b => b.classList.remove('active'));
        btn.classList.add('active');
        const mode = btn.getAttribute('data-mode');
        scene.setAttribute('data-active', mode);
      });
    });
  </script>
</body>
</html>

A plant takes water from the soil with its roots and catches warm sunshine with its green leaves.

Animals breathe air with their lungs, drink water when they are thirsty, and walk on solid ground.

What would happen if an abiotic factor like water suddenly disappeared?

An **ecosystem** is a neighborhood where living and nonliving things share a home and depend on each other.

If a pond dries up and loses its water, frogs cannot swim, fish cannot breathe, and plants turn brown.

<!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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: #1e2945;
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    padding: 12px;
  }

  .grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    width: 100%;
    max-width: 580px;
  }

  @media (max-width: 440px) {
    .grid {
      grid-template-columns: 1fr;
    }
  }

  .panel {
    border-radius: 16px;
    padding: 14px;
    background: #ffffff;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    cursor: pointer;
    user-select: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }

  .panel:active {
    transform: scale(0.98);
  }

  .panel-healthy {
    border: 2px solid #4caf50;
  }

  .panel-dry {
    border: 2px solid #ff9800;
  }

  .tag {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .tag-healthy { color: #2e7d32; }
  .tag-dry { color: #e65100; }

  .scene {
    width: 100%;
    height: 190px;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
  }

  /* Healthy Scene */
  .scene-healthy {
    background: linear-gradient(180deg, #e0f2fe 0%, #bae6fd 45%, #38bdf8 45%, #0284c7 100%);
  }

  /* Dry Scene */
  .scene-dry {
    background: linear-gradient(180deg, #fef3c7 0%, #fde68a 45%, #d97706 45%, #b45309 100%);
  }

  .sun {
    position: absolute;
    top: 8px;
    right: 12px;
    font-size: 24px;
  }

  .sun-hot {
    animation: pulse-sun 3s ease-in-out infinite;
  }

  @keyframes pulse-sun {
    0%, 100% { transform: scale(1); filter: drop-shadow(0 0 2px #f59e0b); }
    50% { transform: scale(1.15); filter: drop-shadow(0 0 8px #d97706); }
  }

  .water-surface {
    position: absolute;
    top: 45%;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: 6px 12px;
  }

  .dry-bed {
    position: absolute;
    top: 45%;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: 6px 12px;
    background: repeating-linear-gradient(45deg, rgba(0,0,0,0.03), rgba(0,0,0,0.03) 10px, transparent 10px, transparent 20px);
  }

  .organism-row {
    display: flex;
    justify-content: space-around;
    align-items: center;
    font-size: 30px;
    z-index: 2;
  }

  .swim {
    animation: swim 2.8s ease-in-out infinite alternate;
  }

  @keyframes swim {
    0% { transform: translateX(-4px) translateY(0); }
    100% { transform: translateX(6px) translateY(-3px); }
  }

  .status-badge {
    margin-top: 10px;
    font-size: 14px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    text-align: center;
  }

  .badge-healthy {
    background: #e8f5e9;
    color: #1b5e20;
  }

  .badge-dry {
    background: #fff3e0;
    color: #b71c1c;
  }
</style>
</head>
<body>

<div class="grid">
  
  <div class="panel panel-healthy">
    <div class="tag tag-healthy">💧 With Water</div>
    <div class="scene scene-healthy">
      <div class="sun">☀️</div>
      <div class="organism-row" style="margin-top: 24px;">
        <span title="Frog">🐸</span>
        <span title="Plant">🪷</span>
      </div>
      <div class="water-surface">
        <div class="organism-row">
          <span class="swim" title="Fish">🐟</span>
          <span class="swim" style="animation-delay: -1.2s; font-size: 24px;" title="Fish">🐠</span>
        </div>
      </div>
    </div>
    <div class="status-badge badge-healthy">Living Thrives ✓</div>
  </div>

  
  <div class="panel panel-dry">
    <div class="tag tag-dry">🏜️ Without Water</div>
    <div class="scene scene-dry">
      <div class="sun sun-hot">☀️</div>
      <div class="organism-row" style="margin-top: 24px;">
        <span style="transform: scaleX(-1); opacity: 0.8;" title="Frog hops away">🐸💨</span>
        <span style="filter: grayscale(0.8) sepia(0.5);" title="Wilted plant">🥀</span>
      </div>
      <div class="dry-bed">
        <div class="organism-row">
          <span style="filter: grayscale(1); transform: rotate(90deg);" title="Cannot breathe">🐟</span>
          <span style="opacity: 0.2; font-size: 20px;">💨</span>
        </div>
      </div>
    </div>
    <div class="status-badge badge-dry">Living Struggles ⚠️</div>
  </div>
</div>

</body>
</html>

Next time you step outside, try pointing to one living friend like a bird, and one nonliving helper like the bright sunshine!

science

Interactions Between Living and Nonliving Components. Identify biotic and abiotic factors in an ecosystem and explain how they interact.

What are Living and Non-Living Things? (KS1 / Early & First Level Science)

Identify Living and Nonliving Things (Kindergarten / Early Stage Science)

The Needs of Living Things and Their Surroundings

At Early Level (P1 / ages 4–5), concrete, sensory-rich pedagogical approaches are vital for mastering abstract terms like 'biotic' and 'abiotic'. Use visual dual-coding (green stickers for living, blue for nonliving) during outdoor 'minibeast and garden safaris' on the school grounds. Structure inquiry around guided questions (e.g., 'Does it grow? Does it need a drink?'). Reinforce interactions through dramatic play and physical model-building where pupils act out plants drinking rain or minibeasts sheltering under stones.

Interactions Between Living and Nonliving Components

Living Things (Biotic)

Nonliving Things (Abiotic)