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STC Plant Growth and Development
Lesson 6: Observing: Leaves and Flower Buds
Kennewick School District
Materials listFor each student: Student notebook 1 quad of plants with
buds
For the class: Life Cycle Cards 1, 2, 3, 4, 5,
6 (Appendix E)
For every two students: 1 hand lens
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
Observe your quad of plants with a hand lens. Look for the following:
Differences between the seed leaves and the true leaves
Number of both kinds of leaves
Color, size, shape, and number of buds
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
Draw and label the plant using a full sheet of paper. Your drawing should show the following: today’s date the age of your plant in days the differences between the two kinds of
leaves the buds the right number of leaves and buds
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
Write several descriptive sentences about your plant.
Hints on what to write:
•Describe how the two kinds of leaves are different•Describe the size and shape of each kind of leaf.•Tell how the two kinds of leaves feel. But touch the leaves very carefully.•Describe the colors of the buds.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
Clean up. Return your plant to the water mat and put the hand lenses away.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
Update your Table of Contents
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
How old are the plants today?
Our plants have changed a lot since Day 1. What was the first stage of the plant’s life cycle?
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
At about 24 hours after planting, the embryonic root emerges.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
After about 28 hours, the seedling emerges from the potting mix. The seed coat is split and the white cotyledons or seed leaves are visible.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
During Day 2 and 3, both the root system and the cotyledons, which are now green, continue to grow.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
On Day 4 or 5, the first true leaves appear at the growing tip of the plant, between the seed leaves.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
From Days 4 through 7, the true leaves continue to emerge and grow at a remarkably rapid pace.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
By Day 8 or 9, the yellow-green flower buds appear in a tight cluster.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
What do you think will happen to the plants next?
Write your predictions in your notebook.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds
true leaves
Larger leaves which develop after the seed leaves with wavy, irregular edges, and a rougher texture.
Add this vocabulary word and its meaning to your glossary.
STC Plant Growth and Development Lesson 6: Observing: Leaves and Flower Buds