"The Germination of Seeds" New Life PPT Download

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"The Germination of Seeds" New Life PPT Download

Part One: Importing New Knowledge

Guess what plants first developed from?

The dispersed seeds will germinate and grow into a new plant when conditions are suitable.

What's inside the seed? Why can it take root, sprout, and grow into a new plant?

Seed Germination PPT, Part 2: New Knowledge Explanation

1. Soak the seeds

Observe the similarities and differences in the shapes of different seeds

Give it a try

Take 10 seeds each of broad beans, rapeseed, and soybeans, put them in beakers containing 200 ml of water, and soak them for 1 to 2 days.

Observe the changes that occur in various seeds and measure how much water the seeds absorb?

Tip: The seeds in the beaker that have lost the most water are the ones that have absorbed the most water.

2. Internal structure of seeds

1. Peel off the seed coats and observe what their seed coats look like.

2. Carefully separate the "watercress" in the seed, and use a magnifying glass to observe what is and what it looks like at the junction of the two cotyledons.

3. Sprouted broad beans

Place the soaked broad bean seeds on a plate covered with cotton, keep the cotton moist, continue to observe the changes in the seeds, and record our findings.

Seed Germination PPT, Part 3: Consolidation Practice

Do it, talk about it

1. Choice

1. The following are all monocotyledonous plants: ( )

A. Sorghum, soybeans, peanuts B. Rice, soybeans, peanuts

C.Rice, wheat, corn D.Wheat, broad beans, sorghum

2. Which of the seeds can develop into new plant larvae: ( )

A.embryo B.germ C.cotyledon D.radicle

2. Fill in the blanks

3. According to the number of cotyledons in the seeds, green flowering plants can be divided into two categories: plants whose seed embryos have ________ are called dicots; plants whose seed embryos have __________ are called monocots .

4. The rice we eat mainly comes from _______ in rice seeds.

Seed Germination PPT, Part 4: Class Summary

1. Structure of seeds

Embryo, endosperm and seed coat

2. The process of seed germination:

The radicle develops into the root. The embryo develops into the stem and leaves. The cotyledons or endosperm provide nutrients needed for the development of each part.

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For more information about the PPT courseware "The Germination of the Seed of New Life", please click the "Germination of the Seed of New Life ppt" ppt tag.

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Update Time: 2024-09-27

This template belongs to science courseware Fourth Grade Science Volume 2, Textbook Edition industry PPT template

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