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Let Science Shine On The Life Cycle of Flowering Plants

Let Science Shine On The Life Cycle of Flowering Plants. Mary Tweedy Curriculum Support Specialist Division of Mathematics and Science. Life Cycle of a Flowering Plant.

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Let Science Shine On The Life Cycle of Flowering Plants

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  1. Let Science Shine On The Life Cycle of Flowering Plants Mary Tweedy Curriculum Support Specialist Division of Mathematics and Science

  2. Life Cycle of a Flowering Plant • SC.4.L.16.1 - Identify processes of sexual reproduction in flowering plants, including pollination, fertilization (seed production), seed dispersal, and germination. (Assessed as SC.3.L.14.1.) • SC.3.L.14.1 - Describe structures in plants and their roles in food production, support, water and nutrient transport, and reproduction.

  3. Schoolyard Field Study: Observing a Wild Flower Materials: A partner, plastic knife, hand lens, paper towel, wild flower (weed) Procedures: • Pick a small plant to observe with a partner. • Dig it out of the ground carefully and shake off the dirt. • Draw your plant and label the parts. • Use a hand lens to observe each part and sketch observations. • Use sensory words to describe the your plant. • Be ready to share with the class.

  4. Plants Parts The Life Cycle of Flowering Plants Word Bank: roots stem leaf flower

  5. Purpose of a Flower Are Flowers More Than Just Pretty?

  6. Flower Power • Essential Question: What are the parts of a flower and the function of each part? • Learning Goals: Observe and identify flower parts. Reconstruct a flower model. Recognize the function of a flower, identifying the processes of reproduction including pollination, fertilization, seed dispersal, and germination.

  7. Let’s visit a flower garden as we read our Flower Power booklet

  8. The Parts of a Flower • What are the three main parts of • flowers? • petals • stamens • pistil

  9. Parts of a Flower

  10. The Stamen:Male Reproductive Part of a Flower Anther: pollen grains (sperm cells) grow in the anther. Filament: holds the anther

  11. The Pistil:Female Reproductive Parts of a Flower Stigma Style Ovary (carpel) Eggs(ovules)

  12. Let’s Explore the Parts of a Flowerhttp://naturalsciences.sdsu.edu/classes/lab2.6/lab2.6.html#anchor20015960 Materials: 1 flower, plastic knife, hand lens, ruler, tweezers, dark sheet of paper • Use the Flower Power Procedure and materials/tools and Flower Power bookletto dissect your flower. • Examine each part with the hands lens. • Complete the Parts of the Flower Observation sheet.

  13. The Parts of a Flower • Sepals protect the bud until it opens. • Petals attract insects. • Stamens make pollen. • Pistil contain the ovary which contains the ovules (eggs). • When fertilized, ovules grow into fruits which contain seed.

  14. Parts of a Flower Quiz 3. _____ 3. 5a.. 4a.. • ______ has two parts: • a. anther • b. filament 4. ______has three parts: a. Stigma b. Style c. Ovary 4b. 5.b 4c. 2. _____ 1 2. Word Bank: petal pistil sepal stamen stem

  15. Flower Puzzle PageAssessment Materials: scissors, glue stick, paper, colored pencils, Flower Power booklet • Cut out and assemble your flower puzzle. • Glue into your journal. • Label parts.

  16. Flower Power Writing Why Do Plants Make Flowers? Stories Must Include: • Common & scientific name • Description of the flower • Explanation of the role of the flower in the life cycle of the plant • Use or value of the plant Writing Assessment Rubric: • Accuracy of information • Creativity • Use of vivid vocabulary • Description of flower • Plant’s use or value

  17. Pollination is the act of transferring pollen grains from the male anther of the stamen to the female stigma. Pollen lands on a female pistil, sperm cells move down to the ovary, fertilizing the egg cells. Fertilization combines DNA. The result is a seed with a tiny plant inside. The ovary grows into a fruit to protect the seeds. What is Pollination? Gizmos:Flower Pollination

  18. Animals, wind, and water can all help in the transfer of pollen. We call animals or insects that transfer pollen from plant to plant "pollinators ". The flower type, shape, color, odor, nectar, and structure vary by the type of pollinator that visits them. Pollinators

  19. Wind Pollination • Some flowers, such as grasses, do not have brightly colored petals and nectar to attract insects. • These flowers are pollinated by the wind.

  20. Flowering plants use: • the wind • insects • bats • birds • mammals • to transfer pollen from the stamen (male) part of the flower to the stigma (female) part of the flower.

  21. What is pollination? How do flowering plants depend on other living things in order to reproduce? Why are young plants like but not identical to their parents? Check Point

  22. Three main parts: 1. seed coat - a covering with two roles: - Protects new plant called embyro - Guards stored food called endosperm. 2. endosperm – stored food 3. embryo – The new plant with structures called seed leaves or cotyledons. Gone to Seed

  23. Senses & Hand Lens Sight - Looks Touch - Feels Hearing – Sounds when dropped Odor – Smells Qualitative Observations Measurement Tools Ruler Tape measure Balance Gram mass pieces Quantitative Observations Observing Seeds

  24. Observing a Seed • Observe the outside of a dry bean seed with a hand lens. Draw it and write down four or more properties including length and width. • Get a wet bean seed to observe. Draw it and write down four or more properties including length and width. • Why is the wet seed larger? • Split it open and observe its parts. Draw and label its inside including the seed coat, cotyledon, and embryo.

  25. Wet Bean 2nd Let’s explore … 1st Lets make Dry Seed Observations: Length: Width: Mass: Color: Texture: Cotyledon or 3rd

  26. How do seeds get dispersed from a plant into the ground? • Some seeds are hidden in the ground by animals such as squirrels as a winter store. • Some seeds have hooks on them and cling to fur or clothes.

  27. How do birds and animals help seed dispersal? • Birds and animals eat the fruits and excrete the seeds away from the parent plant.

  28. Animal-carried Animal-consumed Water-borne Wind-borne Propelled Ways Seeds are Carried Away from a Plant

  29. Water Oxygen Proper temperature Some require proper light Seed Germination What do seeds need to sprout?

  30. What are the variables that affect germination? Test your ideas on the Gizmo: Germination. www.explorelearning.com What did we learn? Water Proper temperature Some require proper light Oxygen Seed Germination

  31. Guided Inquiry Problem Statement: Do all seeds germinate at the same time? Hypothesis: Design a Fair Test: Variables:Test Outcome Control/Constants Materials Procedures: Experiment: Data Collection: Results: Conclusion: http://www.pearsonsuccessnet.com/snpapp/iText/products/0-328-17697-4/xxvii.html

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