The Wonderful Use of Plastic Bottles
The Wonderful Use of Plastic Bottles Plastic bottles are usually regarded as waste products. If they are used rationally, they can be turned into valuables. In general, plastic bottles are divided into plastic bottles with nozzles and plastic bottles with caps. Plastic bottle with nozzle means that a nozzle is installed at the bottle mouth of the plastic bottle. When the nozzle is pressed hard, the pressure in the bottle changes and the liquid in the bottle is ejected from the nozzle.
Common plastic bottles with spray heads include bottles containing hand sanitizer, detergent, shampoo and shower gel. Plastic bottles with covers are ordinary plastic bottles, including beverage bottles, mineral water bottles, etc. Plastic bottles in life are usually disposable and become rubbish after they are used up, which causes environmental pollution and waste of resources. If it can be used rationally and its effect can be brought into full play, it will turn waste into treasure.
First, plastic bottles can be used as teaching aids Plastic bottles can be used as teaching aids in scientific experiment teaching, which alleviates the shortage of scientific equipment to some extent. Plastic bottles are easy to find in life. Teachers and students use them to make teaching aids, which not only improve teaching efficiency, but also cultivate students' practical ability. For example, when exploring the "causes of land erosion", it is necessary to do experiments to verify the relationship between rainfall and land erosion, and water in plastic bottles can be used to simulate rainfall. Plastic bottles with sprinklers can be directly used as sprinklers to simulate rainfall. Plastic bottles with covers can be used after making several small holes in the covers. The large mouth can simulate heavy rainfall, while the small mouth can simulate light rain. After the experiment, the conclusion that "heavy rainfall erodes soil greatly" is drawn, which is completely consistent with the students' conjecture and completes the experiment task well.
For example, when exploring the "frame structure", we can use plastic bottles to do simulation experiments. How to put plastic bottles is the easiest and how to put plastic bottles is the least easy. The plastic bottle can be placed upside down or in a dish with sand (as shown in fig. 1), fully demonstrating the phenomenon that the plastic bottle can be placed upside down most easily because the bottle mouth has a small contact area, light weight, unstable bottom and is easy to fall down. The plastic bottle is placed in the dish, and it is not easy to pour the sand on it, because the bottom of the plastic bottle with the nozzle has a large contact area and is heavy in weight, so it is not easy to pour the plastic bottle when it is placed in the dish. By demonstrating the effect of plastic bottles on the frame structure, the students understood the principle of firm frame structure and material saving.
For another example, when teaching the section "whether an object sinks or floats in the water", the ups and downs of the object in the water should be observed. due to insufficient water tanks in the laboratory, the part above the neck of the oil drum (transparent) can be cut off, so that the lower part becomes a cylindrical bottle, which can be used as a water tank after being cleaned (as shown in fig. 2).
In addition, transparent plastic bottles with nozzles can also be made into measuring cups or cylinders. When making, the measuring cylinder or measuring cup can be used for measurement, and then the scale can be made on the plastic bottle.
Second, plastic bottles are good experimental materials The experimental production needs materials to be completed, but scientific equipment is relatively scarce, so the materials in life can be used to meet the needs of scientific teaching. Plastic bottles can be used for experimental production, which not only stimulates students' interest in learning, but also helps students improve their practical ability and cultivate innovative thinking. For example, plastic bottles can be used as materials when "building a boat". Students made a "catamaran" out of plastic. they used two plastic bottles of the same size. then they opened an opening at the top of the middle of the plastic bottles to facilitate the loading of articles (as shown in fig. 3). they fixed the neck and bottom of the two bottles with iron wires, leaving a distance of 15 cm between the bottles (as shown in fig. 4). finally, they fixed the rubber band on the bottles and wrapped it with a wood chip as pulp (as shown in fig. 5). In this way, the ship uses elastic force as power and plastic bottle as cabin. The buoyancy in the water is large and light, which can increase the carrying capacity of the ship, and the "catamaran" has a large amount of discharged water, so that students can understand the concept of buoyancy more thoroughly.
Another example is when making "my water clock", plastic bottles can also be used. Practice: Take two mineral water bottles, one with the bottom cut off and the other with the mouth cut off, place the plastic bottle with the bottom cut off on top of the plastic bottle with the mouth cut off, then cover the plastic bottle with the mouth, turn the top of the bottle, the water drops drop down, and then make the scale, so it is a simple water clock (as shown in Figure 6).
Figure 6 Making works from plastic bottles not only saves environmental protection, but also creates conditions for students to carry out scientific and technological production activities, promoting students' autonomous learning and exercising their practical ability.
Three, plastic bottles can be made into living utensils Plastic bottles are also very useful in life. They can be made into different articles, providing convenience for people's life and saving expenses. It can be made into pen container, flowerpot, funnel, hanger sleeve, umbrella sleeve, seasoning box, water sprayer, etc. How to use the pen container: directly cut off the part above the neck of the plastic bottle, and the rest can be used as a pen container (as shown in fig. 7). Flower pot method: the flower pot method is the same as that of the pen container. the position above the neck of the plastic bottle is directly cut off, and the rest can be used as flower pots. different flower pots can be made according to the size of the plastic bottle (as shown in fig. 8). Funnel method: cut off the shoulder position of mineral water bottle and remove the lid. the upper part is a simple funnel (as shown in fig. 9). The method of clothes hanger sleeve: cut off the bottom of two mineral water bottles and sleeve them on the two ends of the clothes hanger respectively, which can fully spread the shoulders of heavy clothes, not only make clothes dry faster, but also prevent deformation (as shown in fig. 10). The method of umbrella cover: take 2 mineral water bottles, 1 with the bottom cut off and 1 with the mouth cut off, wrap the bottle with the bottle with the bottom cut off to make the umbrella cover, roll the umbrella used in rain and put it in the bottle, and the water on the umbrella can flow out through the mouth of the bottle (as shown in fig. 11). The method of seasoning box: take several spring water bottles, clean them, cut them at a height of 10 cm, take their bottoms, and glue them together with 502 glue to make seasoning box. It can also be made into a closed seasoning box. several small plastic bottles with a capacity of 100 mL can be cleaned and then glued together with 502 glue. the lid can be opened when taking and putting seasoning (as shown in fig. 12). In addition, the plastic bottle with the spray head can also be used as a water sprayer to water the flowers.
IV. Concluding remarks Plastic bottles are very useful in teaching and life. As long as we are good at thinking, we can turn waste into treasure. In teaching, it can be used as teaching aids or experimental materials to promote the effective development of teaching. In life, it can be made into articles for daily use. More importantly, rational use of plastic bottles can save resources and protect the environment.
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