How Seeds Travel


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By Sara Green

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  • This lesson is designed for a second grade class as the last lesson of a unit focusing on plants. Prior to this lesson, students would have learned the parts and functions of a plant, what plants need to germinate and grow, and what environmental stressors affect plant growth. In the previous lesson, students learned that seeds are found inside of fruits through an investigation. Students also dissected a lima bean seed and discovered that there are baby plants inside of seeds, which is how a new plant grows when the seed is planted in the ground. The purpose of this lesson is for students to investigate why seeds have different properties and characteristics that help them travel. Students will conclude that seeds need to travel to be planted in new places and that they get to new places in different ways. Through this lesson, students will discover how animals, insects, weather, and water help plants travel and thus reproduce. Students will identify different types of seeds and explain how they travel. This lesson meets second grade California Content Standard 2.f –Students know that fruits and flowers are associated with reproduction in plants.
  • How Seeds Travel

    1. 1. Sarah Green Educational Technology 470 San Diego State University Fall 2008
    2. 2. <ul><li>Seeds are found inside flowers & fruits. </li></ul><ul><li>New plants are inside of seeds. </li></ul><ul><li>Seeds are planted & new plants grow. </li></ul><ul><li>Review: Kinds of Fruits </li></ul>
    3. 3. <ul><li>Think of different ways seeds might travel </li></ul><ul><li>Turn to a partner and share your predictions </li></ul><ul><li>Share with the class </li></ul><ul><li>Let’s find out! </li></ul>
    4. 4. <ul><li>Seeds have different characteristics </li></ul><ul><li>These characteristics help seeds travel </li></ul><ul><li>Seeds travel in many different ways </li></ul><ul><li>Seeds travel to become planted & grow </li></ul>
    5. 5. <ul><li>Gardeners & farmers plant seeds in the ground </li></ul><ul><li>These seeds become new plants, trees, & flowers </li></ul><ul><li>People plant fruits & vegetables that we eat </li></ul><ul><li>You may have planted seeds yourself! </li></ul><ul><li>Find Out: The Job of a Farmer </li></ul>
    6. 6. <ul><li>Most plants do not rely on people </li></ul><ul><li>Animals, wind, and water help seeds travel </li></ul><ul><li>Seeds travel to be planted in new places </li></ul>
    7. 7. <ul><li>Animals’ fur and feathers help seeds travel </li></ul><ul><li>Some seeds are sticky and spiky with hooks </li></ul><ul><li>They grab on and stick to animals </li></ul><ul><li>When the animal travels, the seeds travel with it </li></ul><ul><li>Have seeds ever stuck to your clothes? </li></ul>
    8. 8. <ul><li>Animals eat fruit, including the seeds </li></ul><ul><li>The seeds are not digested </li></ul><ul><li>When the animals leave waste, it contains the seeds </li></ul><ul><li>These seeds become new plants </li></ul>
    9. 9. <ul><li>Some animals, like squirrels, bury seeds in the ground </li></ul><ul><li>They sometimes forget about these seeds </li></ul><ul><li>The seeds stay in the ground and become new plants </li></ul>
    10. 10. <ul><li>Some seeds are shaped like parachutes or helicopters! </li></ul><ul><li>They are light and float in the wind </li></ul><ul><li>Wind helps the seeds travel through the air </li></ul><ul><li>The seeds land and grow in new places </li></ul><ul><li>Video of Drifting Seeds </li></ul>
    11. 11. <ul><li>Some seeds float on water! </li></ul><ul><li>Water dispersal is important for plants that live near water </li></ul><ul><li>Pockets of air allow them to float </li></ul><ul><li>Seeds are washed up to the shore </li></ul><ul><li>They will begin to grow if conditions are right </li></ul><ul><li>Floating seeds </li></ul>
    12. 12. <ul><li>Flowers must be pollinated to make new seeds </li></ul><ul><li>Pollination is different from other seed dispersal </li></ul><ul><li>Insects are attracted to flowers because of color and smell </li></ul><ul><li>Insects land on flowers; pollen sticks to their bodies </li></ul><ul><li>They transfer the pollen to new flowers </li></ul><ul><li>This makes new seeds for the flowers </li></ul>
    13. 13. <ul><li>Bees carry out more pollination than any other insect </li></ul><ul><li>Hummingbirds use nectar to help pollinate flowers </li></ul><ul><li>Small mammals, like bats </li></ul><ul><li>Other insects, like butterflies and ants </li></ul><ul><li>An In-Depth Look at Pollination </li></ul>
    14. 14. <ul><li>Traveling seeds land in new places </li></ul><ul><li>If the conditions are right, these plants start to grow </li></ul>
    15. 15. <ul><li>Discuss in small groups. </li></ul><ul><li>What might help these seeds travel? </li></ul>
    16. 16. <ul><li>Why is it important for seeds to be able to travel far? </li></ul><ul><li>How does environment play a role in seed dispersal? </li></ul>