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

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

Part 1: Scientific knowledge

seeds sprout

First: they absorb water and swell. Generally, seeds containing more starch and oil require less water, while seeds containing more protein require more water.

Secondly: as the seeds absorb water and swell until they turn white, respiration gradually strengthens and requires the absorption of a large amount of oxygen. Sowing too deeply or logging water in the soil will cause soil hypoxia and affect seed germination.

Again: Each crop seed has a minimum temperature, optimum temperature and maximum temperature for germination. The optimal temperature for plant seed germination varies depending on the place of origin. Generally speaking, 15-20℃ is optimal for temperate plants, and 25-30℃ is suitable for subtropical and tropical plants.

Seed germination experiment PPT, part 2: knowledge extension

At the beginning of the 20th century, ancient lotus seeds were discovered in the eastern suburbs of Pulandian, Dalian, Liaodong Peninsula, with a lifespan of more than a thousand years. Because the outer skin of lotus seeds is composed of hard fence-like cells, and the cell walls are composed of cellulose, it can prevent the internal infiltration and leakage of water and air; in addition, they are buried in peat soil with low temperature, low humidity, and little microbial interference. It can still germinate, take root, and bloom later.

Seed Germination Experiment PPT, Part 3: Class Summary

Necessary conditions for mung bean seeds to germinate:

suitable temperature

Adequate moisture

plenty of air

Seed Germination Experiment PPT, Part 4: Classroom Exercises

1. When we conduct seed germination experiments, at least ( ) mung bean seeds must be placed in each plate.

2. The germination of mung bean seeds requires ( ), ( ) and ( ).

Seed germination experiment PPT, part 5: homework

1. Plant the mung bean seeds that have sprouted in the experiment into a flower pot, place them in a suitable place, and let the mung bean sprouts grow for a period of time.

2. Predict which conditions will affect the growth of mung bean sprouts.

3. Observe and keep records.

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Update Time: 2024-07-22

This template belongs to science courseware Fifth Grade Science Volume 1, Textbook Edition industry PPT template

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