Materials list

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


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


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.


Clean up. Return your plant to the water mat and put the hand lenses away.


Update your Table of Contents


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?


At about 24 hours after planting, the embryonic root emerges.


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.


During Day 2 and 3, both the root system and the cotyledons, which are now green, continue to grow.


On Day 4 or 5, the first true leaves appear at the growing tip of the plant, between the seed leaves.


From Days 4 through 7, the true leaves continue to emerge and grow at a remarkably rapid pace.


By Day 8 or 9, the yellow-green flower buds appear in a tight cluster.


What do you think will happen to the plants next?

Write your predictions in your notebook.


Class Predictions


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.


flower buds

A flower that has not yet opened.

Add this vocabulary word and its meaning to your glossary.


Materials list

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