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Leaf Classification

Leaf Classification. Life Science Standards:. LS2A: St udents know how many multicellular organisms have specialized structures to support the transport of materials. LS2E: Students know how sugar, water, and minerals are transported in a vascular plant.

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Leaf Classification

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  1. Leaf Classification

  2. Life Science Standards: • LS2A: Students know how many multicellular organisms have specialized structures to support the transport of materials. • LS2E: Students know how sugar, water, and minerals are transported in a vascular plant. • I &E6A: Classify objects in accordance with appropriate criteria.

  3. Objectives: • Students know and can identify multicellular organisms and their specialized structures. • Students know how nutrients and water are transported in vascular plants. • Students are able to classify different leaves based on a criteria.

  4. Spiral Review: Vascular Plants • Composed of million of living cells • Every cell needs water, minerals, and food (sugar). • Vascular system of plants • Xylem- transports water and minerals, one direction. • Begins in roots and ends at leaves. • Pholem-transports sugar to cells, every direction. • Begin at leaves and end in roots.

  5. Group Activity • Rules • Use indoor voices! • Do not get out of your seat. • Listen to your team members. Task: • You have 5 minutes to look closely at each leaf in your collection. • Sort your collection of leaves into two groups. • Group #1 Show xylem and pholem • Group #2 Do not show xylem or pholem

  6. Identify • Leaf veins: The veins that are often raised are bundles of xylem tubes and pholem tubes. Questions for Discussion • How many of your leaves have veins? • Are veins all the same size? • Do the veins branch? Task: Look closely at the leaves and find a new way to sort them.

  7. Classification Definition: Arrange in classes or categories according to shared qualities or characteristics. How can we classify or classroom? How can we classify Ms.Mendoza’s students?

  8. Reclassify • Classify your leaves based on the venation pattern. • Palmate • Pinnate • Parallel

  9. How Leaves Are Classified • Classified by the basic pattern on veins • There are 3 patterns to help classify leaves: • Palmate • Pinnate • Parallel

  10. Palmate Leaf • Several veins extending from the place where the leaf stem attaches to the leaf.

  11. Pinnate Leaf • Pinnate Leaf: One large vein extending the length of the leaf with smaller veins branching off. • Pinna means feather, so pinnate leaf resembles a feather.

  12. Parallel Leaf • Parallel: Many small veins running the length of the leaf. • Long, narrow leaves, like blades of grass, tend to have parallel veins.

  13. Other Ways to Classify Leaves • Leaf shape (blade) • Kind of edge (margin) on the leaf • Kind of attachment to the stem (petiole) • Venation: Palmate, pinnate, and parallel

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