"Rapeseed Flowers Bloom" New Life PPT Download

Description

"Rapeseed Flowers Bloom" New Life PPT Download

Part One: Importing New Knowledge

In spring, flowering plants begin the process of creating new life in the form of blooms.

Rapeseed flowers are blooming PPT, part 2: new knowledge explanation

Look, the rapeseed flowers are blooming, and a life activity of nurturing new rapeseed flowers has begun.

Plant Reproduction: Flowering and Fruiting

Observing a rapeseed flower, can you distinguish its roots, stems, leaves, flowers, fruits and seeds?

Let’s talk about their functions

Their role is to help the plant meet its own needs or reproduce.

Sepal: refers to the outermost ring of the flower, which protects the bud inside.

Petals: protect the inside of the flower and often have color or fragrance.

Task 1: Observe the sepals and petals

Count the number of sepals, look at the color of the sepals, and smell the sepals.

Pay attention to where the petals are growing.

Task 2: Observe the stamens and pistils

What are the similar and different characteristics of stamens? The shape of pistils

Operation tips:

1. Observe whether the rapeseed flower you picked is a complete rapeseed flower.

2. You can use a magnifying glass to observe and describe the observed rapeseed flowers in the group.

3. When dissecting, the sepals of the rapeseed flower should be torn off first, and the integrity of the sepals should be paid attention to.

4. Paste the torn off sepals on the paper one by one, and record the observation results on the observation record sheet.

5. Dissect the petals, stamens and pistils of the rapeseed flower in sequence, observe, paste and record the observation results in the same way.

Rapeseed flowers are blooming PPT, the third part: expansion and extension

Pollination: The movement of pollen from anther to stigma is called pollination.

Pollen needs to be transferred to similar plants

Anthers are an important part of stamens

The stigma is located at the top of the pistil and is the part that receives pollen.

Rapeseed flowers bloom PPT, part 4: Consolidation practice

1. Fill in the blanks

1. Rapeseed, like impatiens, has six parts ( ), ( ), ( ), ( ), ( ), and ( ).

Such plants are called ( ) plants.

2. Flowers are ( ) organs of plants.

2. Judgment questions

1. The fruit of rapeseed is round. ( )

Analysis: The fruit is vertical and the seeds are round.

2. The flowers on a rapeseed plant bloom at the same time. ( )

Analysis: Usually the flowers at the bottom bloom first, and the flowers at the top bloom later.

Rapeseed flowers are blooming PPT, part 5: Class summary

1. Consists of six parts: roots, stems, leaves, flowers, fruits and seeds.

2. Flowers are the reproductive organs of plants

3. Rapeseed flowers are composed of four parts: sepals, petals, stamens, and pistils.

4. Plant flowers undergo a series of changes during the process of forming fruits.

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For more information about the "New Life Rapeseed Flowers Blooming" PPT courseware, please click the New Life ppt Rapeseed Flowers Blooming ppt tag.

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Update Time: 2024-09-17

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

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