Practical gizmos to make yourself name, what to make it with, what to use it for, what it is used fo

Gas Lifts.

However, if I tell you a simple way, the exhaled breath can lift a weight of 10 kilograms, and you can do it yourself, believe it or not, try it yourself.

Preparation: Place a sturdy rectangular paper bag or a plastic bag on the table, the size of which can fit two thick books. Put a whole bunch of books on top of it – take the thickest, heaviest book you can find. At this point, you can start blowing into the bag.

Note: The blow opening should be small, so that it is easier to blow and does not require a lot of effort.

Blow slower and more evenly. You'll notice that the air you blow out, when you get into the bag, slowly puffs up as the bag slowly expands, and you can easily lift up a lot of books on it. At this point, you'll get excited – the breath I exhale has such a magical effect!

In fact, as long as the size of the paper or plastic bag is 10 cm to 20 cm (200 square centimeters), you only need to blow a little more air than one atmosphere to make the bag get a force of 20 kg. Therefore, it is easy to lift a weight of 10 kg.

Salt crystal crafts.

Materials: cotton thread, chopsticks, flat-nosed pliers, metal aluminum wire, 1 kg of salt.

1.Wrap the cotton thread around the aluminum wire at intervals of 1-2 mm per turn, and then bend the aluminum wire into your desired handicraft.

2.Put salt and water (about a liter) in a container (you can choose a small pot, etc.), heat it, and bring it to a boil while stirring.

3.When a crystal emerges, turn off the fire, hang the bent aluminum wire with a thread, and put it in the brine of the container.

4.Place the container in a cardboard box, stuff some old newspaper around it to keep warm, and cover the pot to allow it to cool naturally.

5.A day later, the aluminum wire stained with salt crystals is taken out and dried, and a salt crystal handicraft is completed.

PS: It's a bit complicated, but if you can get it, you might even get praise.

Globe making process.

The whole production process is a four-step process:

Draw a map of the world on the surface of a full ping pong ball.

At both ends and a quarter of the thin iron sheet, drill a small hole and bend it into an arc as a globe support.

Cut a piece of the ball with a diameter of 20 mm on half a ping-pong ball and glue it to a piece of log. Grind a 4 mm diameter strip of wood with sandpaper at one end into a smooth log strip with a diameter of 3 mm, and glue it to the center of the sphere as a bottom pad.

Attach the bracket to the base with a pin. Thin steel wires are passed through the center of the North and South Poles and fixed at both ends of the bracket so that the globe can rotate freely around the axis.

The practice of scientific gizmos is as follows:Materials and materials: batteries, magnets, copper wires.

1. The battery must be selected to be attracted by the magnet.

2. The magnet should be the same diameter as the battery and have a conductive metal plating.

3. Absorb on the negative electrode of the battery and ensure that it will not be short-circuited.

<>5. It should be noted that the two edges below the copper line should not touch the magnet at the same time, and there should be a gap.

6. Adjust the upper and lower heights so that the current can pass through the copper wire on one side at a certain time to generate a loop.

7. Place the copper wire on the battery.

8. The small motor has begun to spin, so if you are interested, try it yourself.

Introduction to ScienceScience is an orderly knowledge system based on testable explanations and the form, organization, etc., of objective things, and divination is systematized and formulaic knowledge. According to the fields to which these (scientific) systems are to be reflected, they can be divided into natural sciences, social sciences, thinking sciences, formal sciences and interdisciplinary sciences.

Science is a system of knowledge that is based on testable explanations and the form, organization, etc. of objective things, and is knowledge that has been systematized and formulated. Its object is objective phenomena, its content is formal scientific theory, and its form is language, including natural language and mathematical language. To make a scientific invention, you need to have innovative thinking and skilled technical operation ability.

Homemade small electric fans, homemade flashlights, running "pigs", electronic balances, automatic waterers, brake throttle, and so on.

That's a lot, so I'll give you a few references.

1. Homemade badminton.

Prepare materials: 1 empty drink bottle, 2 foam fruit net covers, 1 rubber band, 1 glass marble.

Production process:1Take a 250ml empty beverage bottle and cut off the top half of the bottle;

2.Divide the cut part into 8 equal parts, cut it to the neck of the neck with scissors, and then cut each part into the shape of petals of the same size;

3.Put the foam fruit net sleeve on the outside of the bottle and fix it at the mouth of the bottle with a rubber band;

4.Wrap another foamed fruit net around a glass marble, stuff it into the mouth of the bottle, plug it tightly and expose about 1 cm;

5.Cut off half of the ping pong ball, cover the bottom of the hemisphere on the mouth of the bottle, cut the four sides into a whisker, cover the mouth of the bottle and fix it with a rubber band.

6.After beautification and retouching, a homemade shuttlecock was completed. Hit a dozen with a badminton racket and see how it goes?

2. Homemade soap paper.

Materials and tools for crafting:

Hygroscopic white paper, small pieces of soap, a brush and disposable beverage cans.

Production method: first chop the soap and put it in the jar, put the cup on the stove after filling the appropriate amount of water, wait for the soap to melt, cut the white paper into the size of a matchbox, apply the soap liquid one by one, and then take it out to dry it to become soap paper.

3. Homemade hot air balloons.

1.First of all, we cut 6 to 8 leaf-shaped pieces of paper out of soft paper.

2.Fold them in half and glue their edges together to make a balloon.

3.Tape the four wires to the bottom of the balloon. Attach the other end of the thread to the table with plasticine.

4.Try to turn the speed of the hair dryer as slowly as possible. Aim the blower up at the bottom opening and turn the switch on. The balloon will slowly grow larger, tighten the string, and leave the table.

A small invention to solve the global marine litter, the principle is so simple.