"We Saw the Roots First" Plant Growth Changes PPT

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"We Saw the Roots First" Plant Growth Changes PPT

Part One: Growth of Plant Roots

Exchange seed changes

Who grows first, roots, stems or leaves? Is every seed the same?

In what direction do roots grow? Is it consistent with the direction in which the seeds were placed?

Summary of seed changes

Through observation, we found

Seeds germinate first ________ and then ________;

Plant roots grow toward ________;

Root growth rate ________.

We first saw the root PPT, the second part: studying the role of roots

When we water plants, where do we usually water? Why is most of it poured onto the soil?

We try to move the plant seedlings that sprouted in the glass to the flower pot. Are the seedlings easy to take out of the cup?

What role do plant roots play in plant growth and development?

Conduct experiments to study the role of plant roots.

①Choose a plant with roots and put it into a test tube with water.

② Soak the roots of the plant in the water in the test tube.

③Drop some vegetable oil on the water surface to prevent the water in the test tube from evaporating into the air, and mark the water surface.

④Observe the changes in the amount of water in the test tube.

Summarize the functions of plant roots

The roots of plants can absorb water and minerals from the soil to meet the needs of plant growth; they can also fix the plant in the soil.

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For more information about the PPT courseware "The Growth Changes of Plants, We First See the Roots", please click the "The Growth Changes of Plants, We First See the Roots" ppt tag.

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Update Time: 2024-11-20

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

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