The fourth-grade rock specimens are as follows:

1. Take a rock sample and clean it. Note that if it is a water-soluble rock sample, it can be washed with pure alcohol to remove impurities in the rock.

If necessary, you can polish the rock to make it regular. Not every stone is suitable for polishing, it depends on your own needs.

3. Make sample labels, including rock type, collection location, weight, etc. , and you can also add a brief introduction of rock samples for subsequent reference.

4, storage box storage method, custom or hand-made storage box, put the rock samples neatly, and put them in a cool and ventilated place.

5, decorative storage method, you can customize the display shelf, hold up the stones, put them in the display cabinet, or use them as home decorations.

Sample type:

1, the whole specimen.

Usually used to identify plants, scientific names and Chinese herbal medicines. This specimen is also used for vegetation investigation in a certain area.

2. Anatomical specimens.

The purpose of production is to observe and study the internal tissue structure of an organ of a plant. To collect such specimens, only one healthy and representative organ needs to be selected, and it is not necessary to collect the whole branch. Anatomical specimens are usually made into preservative impregnated specimens.

3. Phylogenetic specimens.

The purpose of production is to observe and study the life history of plants, that is, the growth process of a plant from seed germination to growth, flowering and fruiting, which is often used in biology teaching, introduction and cultivation and scientific research.

4. Compare specimens.

Comparative specimens mainly compare the similarities and differences of an organ of different plants. For example, to compare the seed morphology of dicotyledonous plants and monocotyledonous plants, it is necessary to collect mature fruits, such as rape, soybean, cucumber and tomato, remove the peel, dry the seeds, and collect the fruits of wheat, rice and corn for comparison.

Compared with various forms of roots, we can collect cotton with straight roots, rice and wheat with fibrous roots, radish with bulbous roots, carrot with conical roots, radish with cylindrical roots, adventitious roots of tuber potatoes, corn and sugarcane, and parasitic roots of Cuscuta chinensis and Taxilli.