Presentation on theme: "Let Science Shine On The Life Cycle of Flowering Plants Mary Tweedy Curriculum Support Specialist Division of Mathematics and Science."— Presentation transcript:
Let Science Shine On The Life Cycle of Flowering Plants Mary Tweedy Curriculum Support Specialist Division of Mathematics and Science
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. 2 Life Cycle of a Flowering Plant
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.
Plants Parts Word Bank: roots stemleafflower The Life Cycle of Flowering Plants
Purpose of a Flower Are Flowers More Than Just Pretty?
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.
Lets visit a flower garden as we read our Flower Power bookletvisit a flower garden
The Parts of a Flower What are the three main parts of flowers? petals stamens pistil
The Stamen: Male Reproductive Part of a Flower Anther: pollen grains (sperm cells) grow in the anther. Filament: holds the anther
The Pistil: Female Reproductive Parts of a Flower Stigma Style Ovary (carpel) Eggs (ovules)
Materials: 1 flower, plastic knife, hand lens, ruler, tweezers, dark sheet of paper Use the Flower Power Procedure and materials/tools and Flower Power booklet to dissect your flower. Examine each part with the hands lens. Complete the Parts of the Flower Observation sheet. Lets Explore the Parts of a Flower http://naturalsciences.sdsu.edu/classes/lab2.6/lab2.6.html#anchor20015960 http://naturalsciences.sdsu.edu/classes/lab2.6/lab2.6.html#anchor20015960
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.
Parts of a Flower Word Bank: petal pistil sepal stamen stem 2. _____ 1 3. 3. _____ 4. ______has three parts: a. Stigma b. Style c. Ovary 4c. 4a.. 4b. 5.______ has two parts: a. anther b. filament 5a.. 5.b Quiz 2.
Flower Puzzle Flower Puzzle Page Assessment Materials: scissors, glue stick, paper, colored pencils, Flower Power booklet Cut out and assemble your flower puzzle. Glue into your journal. Label parts.
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 Plants use or value Flower Power Writing Why Do Plants Make Flowers?
PollinationPollination is the act of transferring pollen grains from the male anther of the stamen to the female stigma.antherstigma 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 PollinationWhat is Pollination? Gizmos: Flower PollinationFlower Pollination
Pollinators Animals, wind, and water can all help in the transfer of pollen.Animalswindwater We call animals or insects that transfer pollen from plant to plant "pollinators ".pollinators The flower type, shape, color, odor, nectar, and structure vary by the type of pollinator that visits them.
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.
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.
Check Point 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?
Gone to Seed 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.
Observing a Seed 1.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. 2.Get a wet bean seed to observe. Draw it and write down four or more properties including length and width. 3.Why is the wet seed larger? 4.Split it open and observe its parts. Draw and label its inside including the seed coat, cotyledon, and embryo.
Wet Bean Cotyledon or 1 st Lets make Dry Seed Observations: Length: Width: Mass: Color: Texture: 2nd Lets explore … 3rd
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.
How do birds and animals help seed dispersal? Birds and animals eat the fruits and excrete the seeds away from the parent plant.
Ways Seeds are Carried Away from a Plant Animal-carried Animal-consumed Water-borne Wind-borne Propelled
Seed GerminationGermination Water Oxygen Proper temperature Some require proper light What do seeds need to sprout?seedssprout
Seed GerminationGermination 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
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