1. STC Plant Growth and Development Lesson 2: What Is Inside a Seed
STC Plant Growth and Development Lesson 2: What Is Inside a Seed? Kennewick School District

2. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
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Overview
In lesson 1, students looked at the outside of a bean seed. In this lesson, students will look inside to observe the internal structures. Brassica seeds are too small for this experiment; bean seeds are bigger, which allows students to see the characteristics that most seeds share.

3. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
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Lesson Objectives
Students observe how the bean seed has changed after being soaked in water overnight.
Students record their observations.
Students open the bean and observe the inside.
Students draw and label the parts of a bean seed.

4. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
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Background
All seeds have two main parts: the embryo, or baby plant, and the cotyledon, a thickened leaf that stores food. The embryo is the tiny, undeveloped plant that includes all the parts of a mature plant. The outside of the seed, or seed coat, protects these delicate internal structures. The cotyledon contains food—oils, carbohydrates, and protein. Once the plant has emerged and developed leaves, it can manufacture its own food.

5. Materials list For each student: 1 dry bean seed 2-3 soaked bean seeds
STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Materials list
For each student:
1 dry bean seed
2-3 soaked bean seeds
1 paper towel
Student notebook
Activity Sheet 1: Recording Chart for Seed Observations
For every 2 students:
Hand lens

6. What did you learn about the dry bean seed by using your senses?
STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
What did you learn about the dry bean seed by using your senses?
©2003 Microsoft Corporation.

7. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
What did you predict would happen to the dry bean seed after soaking overnight in water?
©2003 Microsoft Corporation.

8. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Use your senses (except taste, of course) to observe the soaked seeds. Compare the soaked seed to a dry seed.
©2003 Microsoft Corporation.

9. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Record your observations of the outside of the soaked seed on Activity Sheet 1, next to yesterday’s observations of the dry seed. Be sure to use accurate describing words.
©2003 Microsoft Corporation.

10. How is the soaked bean seed different from the dry bean seed?
STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
How is the soaked bean seed different from the dry bean seed?
©2003 Microsoft Corporation.

11. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Now peel off the seed coat. Gently pry open the two halves of the seed. Use your hand lens to observe the parts of the seed.
©2003 Microsoft Corporation.

12. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Take another soaked bean and observe it closely, inside and out. Are the two beans similar?
©2003 Microsoft Corporation.

13. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Inside a Bean Seed
Copyright 1991 by the National Academy of Sciences.

14. Contains the food for the beginning underground growth of the plant.
STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Add this vocabulary word and its meaning to your glossary.
cotyledon
Contains the food for the beginning underground growth of the plant.

15. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Add this vocabulary word and its meaning to your glossary.
embryo
A baby plant. The tiny, undeveloped plant that includes all the parts of a mature plant.

16. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Add this vocabulary word and its meaning to your glossary.
seed coat
The outside of the seed. It protects the delicate inside parts of the seed.

17. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Draw what you see on your observation sheet. Label the parts. Your drawing doesn’t need to be a work of art, but should be a clear, complete, and accurate record of the information you have learned about the seed.
©2003 Microsoft Corporation.

18. Lesson 2 Activity Sheet 1 Recording Chart for Seed Observations
STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Lesson Activity Sheet 1 Recording Chart for Seed Observations
Directions: In the spaces below, write one or two accurate words to describe the seed you are observing today.
Dry Bean
Soaked Bean
Color
Shape
Texture
Odor
Size
**Draw the size of your bean in the “Size” section

19. STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
Clean up. Put all materials and supplies where they belong. Put your activity sheet into your notebook. Throw away your seeds and paper towels.

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STC Plant Growth and Development Lesson 2: What Is Inside a Seed?
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