2-LS2-2:Seed Dispersal and Pollination

By the end of the lesson, students will be able to:

1. Understand the concepts of seed dispersal and pollination.
2. Develop a simple model that mimics the function of an animal in dispersing seeds or pollinating plants.

1. Craft materials (colored paper, pipe cleaners, glue, etc.)
2. Scissors
3. Small seeds (e.g., sunflower seeds, beans)
4. Large paper or chart for collaborative drawing
5. Images or videos demonstrating seed dispersal and pollination
6. Books or resources about plants and their life cycles

Teacher Notes:

• Introduction: Begin by discussing the life cycle of a plant. Introduce the terms "seed dispersal" and "pollination" and explain their importance in plant reproduction.

• Vocabulary:

  • Seed Dispersal: The movement or transport of seeds away from the parent plant.
  • Pollination: The transfer of pollen from the male part of a flower to the female part, leading to fertilization.

Pre-lesson Discussion:

• Show images or videos demonstrating different methods of seed dispersal (wind, animals, water) and pollination (insects, wind).
• Discuss the ways animals and insects help plants in seed dispersal and pollination.

Lesson Activities:

1. Model Making:

   • Provide students with craft materials and seeds.
   • In small groups, have students create a simple model that mimics the function of an animal in dispersing seeds or pollinating plants. For example, a paper bee with attached seeds for pollination.

2. Collaborative Drawing:

   • On a large paper or chart, collaboratively draw a scene depicting different methods of seed dispersal and pollination.
   • Discuss the importance of each method in the plant life cycle.

3. Seed Dispersal Simulation:

   • Conduct a simple simulation where students play the role of animals or elements like wind and water to disperse seeds in a designated area.

Conclusion:

Wrap up the lesson by summarizing the concepts of seed dispersal and pollination. Connect the lesson to real-world examples and emphasize the role of animals and elements in helping plants reproduce. Encourage students to observe nature and identify instances of seed dispersal and pollination in their surroundings.

Assessment:

• Model Presentation:

  • Have each group present their model, explaining how it mimics the function of an animal in seed dispersal or pollination.

• Class Discussion:

  • Engage in a class discussion about the importance of seed dispersal and pollination in the life cycle of plants.

Show a time-lapse video of a flower turning into a fruit, highlighting the process of pollination and eventual seed dispersal. Discuss the changes observed and raise questions about how seeds move from one place to another.

1. • Science and Engineering Practices (SEPs):

1. Asking Questions (SEP1):

   • Encourage students to ask questions about the phenomena observed in the video, sparking curiosity about seed dispersal and pollination.

2. Developing and Using Models (SEP2):

   • Guide students in creating models of animals or insects to understand their role in seed dispersal or pollination.

3. Constructing Explanations (SEP6):

   • Have students explain how their models mimic the function of animals in seed dispersal or pollination

Disciplinary Core Ideas (DCIs):

1. LS2.A: Interdependent Relationships in Ecosystems:

   • Plants depend on animals for pollination or seed dispersal.
   • Animals depend on plants for food and, in turn, help plants reproduce.

2. ETS1.A: Defining Engineering Problems:

   • Identify a problem related to seed dispersal and pollination that requires a solution.