Fifth Grade Science Volume 1, Textbook Edition
Science Edition for Sixth Grade Science Volume 2
Third Grade Science Volume 2, Textbook Edition
Science Edition for Sixth Grade Science Volume 1
Third Grade Science Volume 1, Textbook Edition
Fourth Grade Science Volume 2, Textbook Edition
Fourth Grade Science Volume 1, Textbook Edition
Qingdao Edition Fourth Grade Science Volume 2
Hunan Education Edition Fourth Grade Science Volume 1
E-education edition fifth grade science volume 2
E-education edition fifth grade science volume 1
Fourth-grade science volume 2 of the E-education edition
Qingdao Edition Fifth Grade Science Volume 2
Fifth Grade Science Volume 2, Textbook Edition
Zhejiang Education Edition Seventh Grade Science Volume 2
Hunan Education Edition Fifth Grade Science Volume 2
!["Making Plant Specimens" Learn more about biology PPT courseware 2](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/661f0ac4-aa02-450d-8e03-8d8b9a647267.webp)
Category | Format | Size |
---|---|---|
People's Education Press Fourth Grade Science Volume 1 | pptx | 6 MB |
Description
"Making Plant Specimens" Learn more about biology PPT courseware 2
Teaching objectives
Familiar with every step of preparing plant specimens
Master the basic skills of making plant specimens
Complete specimen preparation independently without guidance
How much do you know about making plant specimens?
1. Do you know what preparations should be made before making specimens?
2. How many steps are there to make a plant specimen? What are they?
Precautions
1. Before collecting, you should review basic knowledge and understand and analyze the collection object system;
2. Complete collection and timely processing;
3. The size of the specimen should be no more than 40 centimeters in length.
4. Always pay attention to safety when collecting in the wild and abide by the forest protection regulations.
1. Purpose requirements
Preliminarily master the methods of collecting plant specimens and preparing wax leaf specimens.
2. Utensils
Collection box (or plastic bag), specimen clips, pruning shears, root digging shovel, rope, number plate, label, absorbent paper (straw paper or old newspaper), table paper, cover paper, tweezers, pencil.
Plant specimen preparation steps
1. Collection
1. Herbs should be collected from complete plants.
2. Woody plants should be collected from branches with leaves, flowers or fruits.
3. Put a number tag on the collected specimens
4. Gently put the collected specimens into the collection box (or plastic bag).
5. Pay attention to safety when collecting specimens. Do not eat indiscriminately to prevent poisoning.
2. Pressing of wax leaf specimens
1. As soon as possible, place the sorted specimens on several layers of easily absorbent paper, flatten the front of the leaves and flowers upwards (the backs of a few leaves and flowers should be flattened upwards), and then cover with several layers of paper.
2. Stack the specimens layer by layer, clamp and tie them tightly with specimen clips, and place them in a shaded and ventilated place.
3. At regular intervals, replace the damp paper in the specimen holder with dry paper, and reshape the specimen at the same time to ensure that the specimen dries as quickly as possible.
The replaced wet paper should be dried or dried in time to prepare for the next paper change.
4. Disinfection (completed by teachers or parents):
The method is to put the dried specimens into a sterilization box, place dichlorvos or a mixture of carbon tetrachloride and carbon disulfide in a glass dish, and use gas to fumigate the insects or eggs on the specimens. After about 3 days, the stage paper can be removed. .
Have you learned how to make specimens?
What are the precautions for making specimens? What about the production process?
Collection; pressing and sorting; binding; preservation
Small homework:
Can you complete a herbarium on your own? Give it a try!
Please submit a specimen you made in one week, and let us see your results!
Keywords: Understand more biology teaching courseware, make plant specimen teaching courseware, download PPT courseware for fourth grade science from the People's Education Edition, download science slide courseware for fourth grade, download more biology PPT courseware, make plant specimen PPT courseware Download, .PPT format;
For more information about the PPT courseware "Understanding More Organisms and Making Herbarium Specimens", please click the "Understanding More Organisms and Making Herbarium Specimens" ppt tag.
"Making Plant Specimens" Learn more about biology PPT courseware:
"Making Plant Specimens" Learn more about biology PPT courseware 1. Purpose requirements: Preliminarily master the methods of collecting plant specimens and making wax leaf specimens. The purpose of pressing and drying is to make the water in the plant absorb and evaporate by the paper in a short period of time, so that the specimen can...
File Info
Update Time: 2024-09-11
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