CN215814750U

CN215814750U - Two-in-one simple experimental device for verifying photosynthesis and respiration of plants

Info

Publication number: CN215814750U
Application number: CN202121808061.2U
Authority: CN
Inventors: 李静
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2022-02-11
Anticipated expiration: 2031-08-04

Abstract

The utility model discloses a simple two-in-one experimental device for verifying plant photosynthesis and respiration, relates to an experimental teaching instrument, and particularly relates to an experimental device for verifying plant photosynthesis and respiration to absorb and release related gases in junior middle school biology teaching. Including big plastic bottle (1) and the little plastic bottle (2) of processing of punching, the two assembles through thread gluing (3), and the plant material that the small bottle was used for holding the experiment and uses, and big bottle lid punches and pastes silica gel pad (6), and it plays self-sealing effect when using with the syringe cooperation. The hose (4) is used for draining water when the photosynthesis of the plants is verified, and is matched with a small syringe to extract carbon dioxide or to inject clear lime water into a large bottle when the respiration of the plants is verified. The experimental device has the advantages of ingenious design, easily obtained materials, simple operation and obvious phenomenon, can finish two experiments of verifying plant photosynthesis and respiration, can be repeatedly used, and makes up the defects in practical teaching.

Description

Two-in-one simple experimental device for verifying photosynthesis and respiration of plants

Technical Field

The utility model relates to an experimental teaching instrument, in particular to an experimental device for verifying the absorption and release of relevant gases by plant photosynthesis and respiration in junior high school biology teaching.

Background

At present, for verifying that plant photosynthesis absorbs carbon dioxide and releases oxygen and respiration absorbs oxygen and releases carbon dioxide, two experiments have all been arranged respectively in each version teaching material of junior middle school, and the equipment that the experimental apparatus used is many, and the experiment is prepared loaded down with trivial details, and the equipment is complicated, and the operation is time-consuming, and some experimental phenomena are not obvious, and difficult success is unfavorable for the actual experiment teaching of low-grade student.

Disclosure of Invention

In order to improve the defects of complex preparation, complex assembly, time-consuming operation and the like of the experimental device in the teaching material, common articles in life are taken as materials, ingenious design and assembly are carried out, and a set of simple experimental device is manufactured.

The technical scheme adopted by the utility model for solving the technical problems is as follows: this experimental apparatus includes big plastic bottle (1) and the little plastic bottle (2) of processing of punching, and the two assembles through thread gluing (3), and little plastic bottle is used for holding the plant material of experiment usefulness, when carrying out the photosynthesis experiment, verifies the change of carbon dioxide content with the change of bromine thymol blue solution colour in the big plastic bottle, carries out photosynthesis release oxygen because of the plant, leads to water to spill over from hose (4) to reach the purpose of collecting oxygen. The large plastic bottle cap is punched and the silica gel pad is pasted to play a good automatic sealing effect when being used in cooperation with an injector, and the collected oxygen can be extracted by the glass injector and is checked by the thin wood strip with sparks. When the respiration is verified, a small syringe can be used for extracting carbon dioxide in a large plastic bottle through a hose (4) and then injecting the carbon dioxide into a small beaker filled with clear lime water or injecting the clear lime water inwards. After the carbon dioxide detection is finished, the burning candle or match is put into the bottle mouth, and the candle or match extinguishes to indicate that the seed sprouts to absorb oxygen. If a control experiment needs to be carried out, a set of other experimental device can be additionally taken to load the same amount of cooked mung bean seeds into a small plastic bottle, if other parts capable of carrying out photosynthesis such as plant leaves are selected for carrying out the experiment, the whole set of experimental device only needs to be sleeved by a black plastic bag, and other steps are the same as the steps described above.

The utility model has the advantages that the improved experimental device has easily obtained materials, simple and convenient installation, simple operation and obvious phenomenon, can finish two experiments of verifying the photosynthesis and the respiration of the plant, can be repeatedly used, makes up the defects in the actual teaching, improves the effectiveness of the biological experiment teaching, improves the classroom efficiency and has obvious effect.

Drawings

FIG. 1 is a schematic diagram of the experimental apparatus.

In fig. 1:

1-big plastic bottle 2-small plastic bottle (perforation) 3-thread gluing (height adjustable)

4-hose 5-clip 6-silica gel pad

FIG. 2 is a schematic diagram of the experimental apparatus for verifying photosynthesis of plants.

FIG. 3 is a schematic diagram of the experimental apparatus for verifying plant respiration.

Detailed Description

(I), verifying that photosynthesis of plants absorbs carbon dioxide and releases oxygen (as shown in figure 2):

taking appropriate amount of Goldfish algae (or celery leaf, and the material is simpler and more economical), placing into small plastic bottle, assembling the small plastic bottle and large plastic bottle together, slowly filling with clear water, and adding NaHCO₃(1g/1000mL), adding bromothymol blue reagent dropwise into a large plastic bottle to form blue-green color, and blowing air or introducing proper amount of carbon dioxide into the bottle by using a suction pipe to make the solution become yellow due to increase of carbon dioxide. After the preparation work in earlier stage is ready, screw up the bottle lid, open the clip, fix the hose on the bottle lid with the nanometer glue, place the device in warm and sunny place, just can observe very fast that there is a large amount of bubbles to produce in the big plastic bottle, and just have the water droplet to flow out from the hose ceaselessly after a very short period of time, if illumination is more weak or illumination time then need carry out the light filling too short. When enough oxygen is collected, the needle head of the glass syringe is inserted into the small hole of the bottle cap through the silica gel gasket above the bottle cap, a tube of oxygen is fully extracted, then the piston of the syringe is pulled out, the incense stick which is going to be extinguished quickly extends into the syringe, the incense stick burns again, and the oxygen is released by the respiration of the plant. As the plant photosynthesis proceeded, the solution turned blue-green again, indicating that the plant photosynthesis consumed carbon dioxide. The silica gel gasket plays a better automatic sealing role when being matched with an injector for use. Oxygen can be pumped through the small hole of the bottle cap, and NaHCO can be supplemented into the large plastic bottle through the small hole by using a small syringe₃And (3) solution. The bottle cap does not need to be opened in all experimental processes, so that oxygen can be avoidedThe waste of qi is favorable for teachers to continuously carry out multiple experimental teaching on multiple classes.

(II) verifying that the respiration of the plant absorbs oxygen and releases carbon dioxide (as shown in figure 3):

and (3) filling a proper amount of germinated mung bean seeds into the small plastic bottle, assembling the small plastic bottle with the large plastic bottle, screwing the bottle cap, placing the device in a warm place, and performing an experiment after 5-24 hours. During the experiment, a small syringe is used for extracting a tube of clear lime water in advance, then the front end of the syringe is inserted into the hose, the clamp of the hose is opened, the syringe is pushed to enable the clear lime water to slowly flow into the bottom of the large plastic bottle, then the clamp is closed, the syringe is slightly vibrated and shaken evenly, and the clear lime water can be observed to gradually become turbid. When repeated demonstration experiments of a plurality of parallel classes are carried out, carbon dioxide can be extracted from the hose by a syringe and then injected into a small beaker filled with clear lime water, and the phenomenon is observed after the carbon dioxide is shaken uniformly by vibration. This method is referred to as "extraction" for short. After the carbon dioxide detection is finished, the burning candle or match is put into the bottle mouth, and the candle or match extinguishes to indicate that the seed sprouts to absorb oxygen. If a control experiment needs to be carried out, a set of other experimental device can be additionally taken to load the same amount of cooked mung bean seeds into a small plastic bottle, if other parts capable of carrying out photosynthesis such as plant leaves are selected for carrying out the experiment, the whole set of experimental device only needs to be sleeved by a black plastic bag, and other steps are the same as the steps described above.

Claims

1. The utility model provides a verify simple and easy experimental apparatus of two unifications of plant photosynthesis and respiration which characterized in that: the novel plastic bottle comprises a large plastic bottle, a small plastic bottle, a thread gluing, a hose, a clamp and a silica gel pad, wherein an opening is formed in the upper bottle cap of the large plastic bottle, the silica gel pad is used for sealing, a plurality of small holes are processed in the small plastic bottle and are assembled together with the large plastic bottle through the thread gluing, the hose is communicated with the large plastic bottle and an external space through a hole reserved in the large plastic bottle, and the clamp is arranged on the hose.

2. The simplified experimental setup of claim 1, wherein: when the relevant operation is carried out, a syringe is matched for extracting or injecting the experimental material.