ICSE · Grade 6

Ch. 1: Plant Life – The Leaf

Explore the leaf as the plant’s food factory: structure (base, petiole, lamina), venation, simple vs compound leaves, phyllotaxy, photosynthesis, transpiration, stomata, modifications and classic lab experiments — with full interactive animations.

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Root system vs shoot system External structure of a leaf Venation: reticulate and parallel Simple and compound leaves Phyllotaxy: alternate, opposite, whorled Photosynthesis, transpiration, stomata Leaf modifications and experiments
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Science tip: use Visual and Concept modes — diagrams and particle models help you “see” the idea, not only read it.
# The Leaf — Super Simple A **leaf** is the flat green part of a plant. It is the plant’s **food factory**. ### Why green? Because of a pigment called **chlorophyll**. Chlorophyll catches sunlight. ### What does a leaf do? 1. **Photosynthesis** — makes food using sunlight, air (CO₂) and water 2. **Transpiration** — lets out extra water as vapour 3. **Gas exchange** — takes in and gives out gases through tiny pores called **stomata** ### Three main parts | Part | Job | |------|-----| | **Lamina** (blade) | Flat green surface — makes food | | **Petiole** (stalk) | Holds the blade | | **Leaf base** | Joins the leaf to the stem | > Use the **Interactive leaf lab** above! Try every tab: Photosynthesis, Transpiration, Leaf parts, Venation, Types, Phyllotaxy, Modifications, Stomata, Root & shoot, Experiments.
Interesting facts Common mistakes Vocabulary Revision notes

Topics in this chapter

  • Root and shoot systems
    Root below soil (fix + absorb). Shoot above soil (stem, leaves, buds, flowers, fruits).…
  • Parts of a leaf
    Leaf base, petiole, lamina. Apex, margin, midrib, veins, stipules. Sessile vs petiolate.…
  • Venation
    Reticulate (dicots) and parallel (monocots). Veins support, distribute water, channel food.…
  • Simple and compound leaves
    Simple: whole lamina + axillary bud. Compound: leaflets; pinnate or palmate.…
  • Phyllotaxy
    Alternate, opposite, whorled — for maximum sunlight.…
  • Photosynthesis
    CO2 + H2O + sunlight → food + O2. Plants are primary producers.…
  • Transpiration and stomata
    Water vapour loss; stomata with guard cells control gas and water exchange.…
  • Leaf modifications
    Tendrils, spines, bulbs, carnivorous traps, Bryophyllum propagation.…
  • Experiments
    Chlorophyll in alcohol; starch-iodine test; oxygen from water plant in sunlight.…

Philosophy check

  • What is this civilization?
  • Why was it advanced?
  • How did cities work?
  • Where do we still see these ideas?
  • Exams — what will be asked?