CN205992350U - The simple demonstration teaching aid that a kind of checking aerostatic buoyancy exists - Google Patents

Abstract

The utility model discloses a simple demonstration teaching aid for verifying the existence of air buoyancy, which comprises balloons and bottled carbonated beverages, mints are placed in the balloons, the balloons are set on the bottle mouths of the opened bottled carbonated beverages and tightly sealed; the utility model also includes a Gravity measuring device, matched with balloons and bottled carbonated drinks. The gravity measuring device is an electronic scale, and balloons and bottled carbonated beverages are placed on the electronic scale. When using, first measure the weight of the balloon and bottled carbonated beverage, including the mint in the balloon and the drink in the bottle; then pour the mint in the balloon into the drink, the mint will cause a large amount of gas in the drink to escape, resulting in As the balloon expands, electronic scales or force sensors can accurately display changes in its weight, thereby verifying the presence of air buoyancy. The whole process is fast and the phenomenon is obvious, which plays an important role in improving the efficiency and convincing power of demonstration experiments and students' learning interest.

Description

A Simple Demonstration Teaching Aid for Verifying the Existence of Air Buoyancy

technical field

The utility model relates to a simple demonstration teaching aid for verifying the existence of air buoyancy.

Background technique

In junior high school teaching, buoyancy has always been the focus of teaching. However, more space is used for the teaching of liquid buoyancy. The relevant teaching aids are related to the teaching of "The Buoyancy of Water" in Chapter 1, Section 3, Chapter 1, Section 3, of the Eighth Grade Junior High School Science of Zhejiang Education Edition. Control variable inquiry experiments to gain a comprehensive understanding of water buoyancy. On the other hand, it is difficult for students to form a clear understanding of the existence of air buoyancy, and there are currently no simple and effective teaching aids to help students understand air buoyancy.

Contents of the invention

The purpose of the utility model is to provide a simple teaching aid, which can visually verify the existence of air buoyancy.

The utility model is achieved through the following technical solutions:

A simple demonstration teaching aid for verifying the existence of air buoyancy is characterized in that: it includes balloons, bottled carbonated beverages, mints are placed in the balloons, the balloons are placed on the openings of bottled carbonated beverages that have been opened and tightly sealed; it also includes a gravity Measuring device, matched with balloons and bottled carbonated drinks.

The gravity measuring device is an electronic scale, and balloons and bottled carbonated beverages are placed on the electronic scale.

The gravity measuring device is a force sensor, and the balloon and bottled carbonated beverage are suspended under the force sensor.

When the utility model is in use, first measure the weight of the balloon and bottled carbonated beverage, including the mint in the balloon and the drink in the bottle; then pour the mint in the balloon into the drink, and the mint will cause a large amount of gas in the drink Escape, causing the balloon to expand, electronic scales or force sensors can accurately display the change in its weight, thereby verifying the existence of air buoyancy.

The beneficial effects of the utility model are: the teaching aid transforms the commonly used lever balance principle used in middle schools, injecting gas into the device on one side of the lever to verify the buoyancy of the air, and transforms it into a gas generating device designed inside the device, without the need for external gas to be filled into it Gas, and the electronic scale is more sensitive, and the sensor has the advantages of intuitive and real-time, which not only avoids the interference of human operation on the balance of the lever, but also verifies the air buoyancy with data. The whole process is fast and the phenomenon is obvious, which plays an important role in improving the efficiency and convincing power of demonstration experiments and students' learning interest.

The teaching aid described in the utility model has good intuition and can better help students understand the existence of air buoyancy. The simple demonstration teaching aid for verifying the existence of air buoyancy is to show the formation process and results of air buoyancy. And the teaching aid is assembled with common materials in daily life, and the living materials are applied to science classroom teaching to form an intuitive understanding of air buoyancy. The design of this teaching aid can be used as a demonstration teaching in the buoyancy class of junior high schools. Materials such as balloons and cola are changed from irrelevant to relevant, which can stimulate students' interest in learning and deepen students' understanding of buoyancy.

Description of drawings

For ease of description, the utility model is described in detail by the following specific embodiments and accompanying drawings.

Figure 1 is a schematic structural view of Embodiment 1.

Fig. 2 is a schematic structural diagram of the second embodiment.

detailed description

Embodiment 1: as shown in Figure 1. Embodiment 1 comprises balloon 1, bottled carbonated beverage 3, and mint candy 2 is placed in the balloon, and balloon is enclosed within the bottleneck of the bottled carbonated beverage that has been opened and tightly sealed; Also includes an electronic scale 4, and balloon, bottled carbonated beverage match.

The teaching aid demonstration of embodiment 1 is divided into three parts. First, put the ground mints in the balloon, then put the balloon in the mouth of a 300ml carbonated drink bottle, and finally tie it up with a string to make a demonstration device. The second is that after the electronic scale 4 is debugged, the demonstration device is placed on the electronic scale to record the data. The electronic scale 4 is used to display the mass change before and after the reaction of the demonstration device, so as to infer the existence of air buoyancy. The third is to pour the mints into the balloon, wait until the display on the electronic scale does not change, and compare the difference between the two groups of data before and after.

Embodiment 2: as shown in Figure 2. Embodiment 2 is different from Embodiment 1 in that Embodiment 2 also includes a net bag 5, a force sensor 6, a computer 7 configured with "DISLab 6.9" software, a data collector 8, a data line 9 and an iron stand 10, and the configuration includes The computer 7 of "DISLab 6.9" software is used as a force display instrument, the data collector 8 and the data line 9 are used to connect the force sensor 6 and the computer 7, the iron stand 10 is used to fix the force sensor 6, and the net pocket 5 is used To hang the demonstration device stably on the force sensor 6 hook.

The teaching aid demonstration of embodiment 2 is divided into three parts. First, put the ground mints in the balloon, then put the balloon in the mouth of a 300ml carbonated drink bottle, and finally tie it up with a string to make a demonstration device. The second is to connect the sensor, place the coke balloon device with a net bag on the iron stand, open the "DISLab 6.9" software, and observe the display. The third is to pour the mints into the balloon, wait for the computer display to stop changing, and compare the difference between the two groups of data before and after.

Demonstration results: The bottled carbonated beverage 3 will react quickly after contacting the mint candy 2, causing the balloon to expand. Using electronic scales or sensors, the quality and force changes of the cola balloon device can be accurately displayed. Through the change of values, students can intuitively get Draw the conclusion that air buoyancy exists.

This teaching aid changes the principle of lever balance commonly used in middle schools, injecting gas into the device on one side of the lever to verify air buoyancy, and transforms it into designing a gas generating device inside the device without filling gas into it from the outside, and the electronic scale is more sensitive. , the sensor has the advantages of intuition and real-time, which not only avoids the interference of human operation on the balance of the lever, but also verifies the air buoyancy with data. The whole process is fast and the phenomenon is obvious, which plays an important role in improving the efficiency and convincing power of demonstration experiments and students' learning interest. The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any change or replacement that is not thought of through creative work should be covered within the scope of protection of the utility model . Therefore, the protection scope of the present utility model should be determined by the protection scope defined in the claims.

Claims (3)

1. a kind of checking aerostatic buoyancy exist simple demonstration teaching aid it is characterised in that：Including balloon, bottled carbonic acid drink, gas It is placed with peppermint candy, balloon is enclosed within the bottleneck of the bottled carbonic acid drink having already turned on and tightens sealing in ball；Also include a gravity to survey Amount device, is matched with balloon, bottled carbonic acid drink.

2. the simple demonstration teaching aid that exists according to a kind of checking aerostatic buoyancy described in claim 1 it is characterised in that：Described Gravity measuring device is electronic scale, and balloon, bottled carbonic acid drink are placed on electronic scale.

3. the simple demonstration teaching aid that exists according to a kind of checking aerostatic buoyancy described in claim 1 it is characterised in that：Described Gravity measuring device is force transducer, and balloon, bottled carbonic acid drink are suspended under force transducer.