Seed Germination & Growth

Grade 7 · General Science

Semester 2 | Period 6 | Week 33

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Subject: General Science

Semester: 2

Period: 6

Week: 33

School Name:
Teacher’s Name:
Subject: General Science
Grade Level: Grade 7
Date:
Week & Period: Week 33, Period 6
Lesson Duration: 45 minutes
Topic: Seed Germination & Growth
Sub-topic: Types of Seeds, Parts of a Seed, Seed Germination Process & Conditions

 

Learning Objectives

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

  1. Define germination.
  2. Differentiate between monocot and dicot seeds with examples.
  3. Identify and describe the parts of a seed.
  4. Explain the process of germination.
  5. State the conditions necessary for seed germination.

 

Previous Knowledge

Students already know that:
• Seeds are planted to grow crops.
• Farmers in Liberia plant beans, maize, rice, and other seeds.

 

Instructional Materials

  • Textbook: General Science for Grade 7
    • Real seed samples: beans, maize, rice, pea, corn
    • Chart/diagram of a seed showing its parts
    • Chalkboard, markers, students’ notebooks

 

Lesson Development – ABC Model

A – Anticipation (Warm-up / Starter)

Time: 5–7 minutes
Activity: The teacher shows students two different seeds (bean and maize). Teacher asks:

  • What do you think is inside a seed?
  • How does a seed grow into a plant?
    Learners’ Role: Respond and share ideas.
    Teacher’s Role: Listen, guide, and write responses on the board.

 

B – Building Knowledge (Main Lesson Body)

Time: 25–30 minutes

Teacher’s Role (Expanded Explanation & Demonstration)

  1. Meaning of Germination
  • Begin with a question: “When you plant beans or maize in the soil, what happens after some days?”
  • Guide learners to understand that germination is the process by which a seed develops into a young plant.
  • Stress that every big tree or crop starts from a tiny seed.

 

  1. Types of Seeds (use real samples for demonstration)
  • Dicot seeds → have two cotyledons (seed leaves). Examples: beans, groundnut, pea.
  • Monocot seeds → have one cotyledon (seed leaf). Examples: maize, rice, corn, millet.
  • Show learners the cross-section of beans and maize to visualize the difference.

 

  1. Parts of a Seed (Explained in Detail)
  • Testa → hard outer coat protecting the seed from damage and disease.
  • Tegmen → thin layer just beneath the testa.
  • Cotyledon → stores food for the embryo (mainly in dicots).
  • Endosperm → nutrient-rich tissue (important in monocots like maize and rice).
  • Hilum → scar on the seed showing where it was attached to the fruit.
  • Micropyle → tiny hole through which water enters during germination.
  • Embryo → baby plant inside the seed.
  • Radicle → part of embryo that develops into the root.
  • Plumule → part of embryo that grows upward to become the stem and leaves.

(Teacher should display a large labeled diagram on the board or chart, and/or cut open a soaked bean seed to show cotyledons and embryo.)

 

  1. Seed Germination Process (Step by Step)
  • Stage 1 → Seed absorbs water through the micropyle.
  • Stage 2 → The testa (seed coat) softens and breaks.
  • Stage 3 → The radicle grows downward into the soil to form the root.
  • Stage 4 → The plumule grows upward above the soil to form stem and leaves.
  • Stage 5 → The young plant begins to make its own food through photosynthesis.

(Teacher may demonstrate by soaking beans or maize seeds a few days before class so learners can observe different germination stages.)

 

  1. Conditions Necessary for Germination (Explained with Importance)
  • Water → softens the seed, dissolves food, and activates enzymes.
  • Air (oxygen) → needed for respiration so the seed can release energy.
  • Temperature (warmth) → enzymes work best under warm conditions.
  • Spacing → prevents overcrowding and competition for nutrients, sunlight, and water.

 

Learners’ Activities (Expanded & Interactive)

  • Observation: Learners observe real dicot (beans/groundnut) and monocot (maize/rice) seeds, noting the differences.
  • Diagram Labeling: Students label seed diagrams with the correct parts.
  • Dramatization: In groups, learners dramatize the stages of germination (one plays “seed,” another “water,” another “radicle,” etc.).
  • Matching Exercise: Learners match each condition of germination with its function (e.g., Water → softens seed).
  • Mini Experiment: Teacher guides learners to set up a simple germination test → beans soaked in wet cotton versus dry cotton, to show the importance of water.

 

Assessment Checks (Expanded)

  • Oral Questions:
  1. What is germination?
  2. Give one example of a monocot seed and one example of a dicot seed.
  3. Which part of the seed grows to become the root?
  4. Why is water important for germination?
  5. What will happen if seeds are planted too close together?
  • Short Written Quiz:
    • Fill in the blanks: The __________ becomes the shoot, while the __________ becomes the root.
    • True/False: A maize seed has two cotyledons.
    • List three conditions necessary for germination.

 

Notes (Expanded & Detailed)

  • Germination is how a seed develops into a new plant.
  • Seeds are either dicot (two cotyledons: beans, groundnut) or monocot (one cotyledon: maize, rice).
  • Parts of a seed include testa, tegmen, cotyledon, endosperm, hilum, micropyle, embryo, radicle, plumule.
  • In germination:
    • Radicle → root
    • Plumule → shoot
  • Conditions required for germination: water, air, warmth, spacing.
  • Without these conditions, a seed cannot grow.

 

Extended Assignments (For Learners)

  1. Draw and label the parts of a seed.
  2. Write out the stages of seed germination in order.
  3. Explain the difference between monocot and dicot seeds, with examples.
  4. Why is spacing important when planting seeds?
  5. Set up a germination test at home (beans in moist cotton) and record observations for 5 days.

 

C – Consolidation (Conclusion & Assessment)

Time: 5–8 minutes

Summary (Teacher & Learners):

  • Meaning of germination.
  • Types of seeds (monocot & dicot).
  • Parts of a seed.
  • Seed germination process.
  • Conditions necessary for germination.

Evaluation Questions (Quick Quiz):

  1. Define germination.
  2. Name two examples of monocot seeds.
  3. Name two examples of dicot seeds.
  4. Which part of the seed develops into a shoot?
  5. Mention three conditions necessary for seed germination.

 

Assignment (Expanded)

  • Draw and label a neat diagram of a dicot seed (bean) and a monocot seed (maize).
    • Write 5 sentences explaining why spacing is important during seed germination and growth.

 

Differentiation / Inclusive Strategies

  • Struggling Learners: Use real seeds for hands-on identification.
    • Advanced Learners: Research the difference between epigeal and hypogeal germination.
    • Students with Disabilities: Provide tactile seeds for touch-based identification and pictorial charts.

 

Teacher’s Reflection (After Class)

  • What worked well? ___________________________________
    • What needs improvement? ____________________________
    • Students’ engagement level: □ High □ Medium □ Low