Presentation on theme: "Let Science Shine On The Life Cycle of Flowering Plants"— Presentation transcript:
1Let Science Shine On The Life Cycle of Flowering Plants Mary TweedyCurriculum Support SpecialistDivision of Mathematics and Science
2Life Cycle of a Flowering Plant SC.4.L 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 Describe structures in plants and their roles in food production, support, water and nutrient transport, and reproduction.
3Schoolyard 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.Explain: Gr. 4 SF pp : What are the parts of plants?
4The Life Cycle of Flowering Plants Plants PartsClick on Plant Parts to review. Play Life Science SF video: Characteristics of Plants from PD DVD or from pearsonsuccessnet.comWord Bank: roots stem leaf flower
5Purpose of a Flower Are Flowers More Than Just Pretty? Engage: Read aloud Flowers: More Than Just Pretty . Discuss what we can do to find out the answer.
6Flower PowerEssential 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 reproductionincluding pollination, fertilization, seeddispersal, and germination.
7Let’s visit a flower garden as we read our Flower Power booklet Students make the foldable Flower Power booklet.
8The Parts of a Flower What are the three main parts of flowers? petals stamenspistilExplain: Gr. 4 SF pp Parts of a Flower View Love Me, Love me not to see parts of the flower.
10The Stamen: Male Reproductive Part of a Flower Anther:pollen grains (sperm cells) grow in the anther.Filament:holds the anther
11The Pistil: Female Reproductive Parts of a Flower StigmaStyleOvary (carpel)Eggs(ovules)
12Let’s Explore the Parts of a Flower http://naturalsciences. sdsu Materials: 1 flower, plastic knife, hand lens, ruler, tweezers, dark sheet of paperUse 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.
13The 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.
14Parts of a Flower Quiz 3. _____ 3. 5a.. 4a.. ______ has two parts: a. antherb. filament4. ______hasthree parts:a. Stigmab. Stylec. Ovary4b.5.b4c.2. _____12.Evaluate: Quiz - Number paper 1. – 5. Use word bank to identify the numbered parts. Then have students complete Connected Learning ?’s 1-8.Word Bank: petal pistil sepal stamen stem
15Flower Puzzle Page Assessment Materials: scissors, glue stick, paper, colored pencils, Flower Power bookletCut out and assemble your flower puzzle.Glue into your journal.Label parts.Review with video: Love me , Love me notExplain for evaluation
16Why Do Plants Make Flowers? Flower Power WritingWhy Do Plants Make Flowers?Stories Must Include:Common & scientific nameDescription of the flowerExplanation of the role of the flower in the life cycle of the plantUse or value of the plantWriting Assessment Rubric:Accuracy of informationCreativityUse of vivid vocabularyDescription of flowerPlant’s use or value
17What is Pollination? Gizmos: Flower Pollination 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.Explain: Gr. 4 SF pp Pollen on the Move
18PollinatorsAnimals, 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.
19Wind PollinationSome flowers, such as grasses, do not have brightly colored petals and nectar to attract insects.These flowers are pollinated by the wind.
20Flowering 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.View video to see View of Attraction for pollinators.
21Check 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?Explain for review: Students make the foldable – Plant Reproduction.
22Gone 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 food3. embryo – The new plant with structures called seed leaves or cotyledons.Explain: Gr. 4 SF p. 58 parts of a seed and view Gone to seed to see what happens after pollination.
23Observing Seeds Senses & Hand Lens Sight - Looks Touch - Feels Hearing – Sounds when droppedOdor – SmellsQualitativeObservationsMeasurement ToolsRulerTape measureBalanceGram mass piecesQuantitativeObservations
24Observing a SeedObserve 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.
25Wet Bean 1st Lets make Dry Seed 2nd Let’s explore … 3rd Observations: Length:Width:Mass:Color:Texture:Have students explore the variables that affect seed germination by going online to and doing the Germination Gizmo.Cotyledon or3rd
26How 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.
27How do birds and animals help seed dispersal? Birds and animals eat the fruits and excrete the seeds away from the parent plant.
28Ways Seeds are Carried Away from a Plant Animal-carriedAnimal-consumedWater-borneWind-bornePropelledTake students on a seed scavenger hunt around the schoolyard.
29What do seeds need to sprout? Seed GerminationWhat do seeds need to sprout?WaterOxygenProper temperatureSome require proper lightHow do we know?
30Seed Germination What are the variables that affect germination? Test your ideas on the Gizmo: Germination.What did we learn?WaterProper temperatureSome require proper lightOxygenClick on Germination to learn more about variables that affect germination.Students can also do the GIZMO: Germination.
31Guided InquiryProblem Statement: Do all seeds germinate at the same time?Hypothesis:Design a Fair Test:Variables: Test Outcome Control/ConstantsMaterialsProcedures:Experiment:Data Collection:Results:Conclusion:Students work in groups following the scientific method to do an investigation. See AIMS book Primarily Plants or Budding Botanists for ideas.Write problem statement. Identify variables….31