"Seed Germination Experiment (2)" Biology and Environment PPT Courseware 2

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"Seed Germination Experiment (2)" Biology and Environment PPT Courseware 2

1. Experimental implementation plan

How were your experiments conducted?

Report on the status of your group.

2. Discussion of experimental results

Previous question: What are the conditions required for seeds to germinate?

Basic conditions for seed germination

One is temperature. The lowest temperature for seed germination is 6-7°C, and normal germination can occur at 12-14°C. The optimal temperature is 20-25°C, and the highest is 35°C.

The second is moisture. Generally, it needs to absorb 120-140% of the water equivalent to the dry weight of the seed itself to germinate.

The third is sufficient oxygen.

3. Planting mung bean sprouts

Plant the mung beans that have sprouted in the experiment into a flower pot and place them in a suitable place. Let the mung bean sprouts grow for a while.

Guess what conditions will affect the growth of mung bean sprouts.

Communicate findings from experiments

1. How are my mung bean sprouts growing?

2. Why do everyone’s mung bean sprouts grow differently?

3. How can we make mung bean sprouts grow better?

4. What are the necessary conditions for the healthy growth of mung bean sprouts?

If the experimental conditions remain unchanged, what will happen to the mung bean sprouts in the two flower pots?

At the beginning, both groups of mung bean seedlings will grow. The mung bean seedlings without light will grow faster, but the stems are slender and slightly yellow. The mung bean seedlings with light will grow slightly slower, but the stems will be strong and light green. After a few days, the stems of the mung bean seedlings without sunlight will droop, the leaves will turn yellow, and they will gradually die. Mung bean seedlings that are exposed to light continue to grow and have green leaves.

This shows what?

Mung bean sprouts need sunlight to grow.

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Update Time: 2024-09-04

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