A little higher technology production of science and technology, kneel and beg, the sooner the bette

If necessary, you can leave your QQ mailbox, wireless electronic small production of finished products.

1 as a parachute.

Material: white thread, plasticine (purple gauze mud), plastic paper.

Method: Tie 8 white threads evenly on plastic paper, then knead the plasticine into a small figure, and pinch the other end of the thread on the villain.

2 tumblers. Materials: table tennis balls, white cardboard, plasticine, colored pencils, glue, scissors, etc.

How to make: 1) Remove half of the table tennis ball with scissors, knead the plasticine into a ball and fill it in half of the table tennis ball.

2) Cut the white cardboard into a fan, the arc length of the fan should be slightly larger than the circumference of the table tennis ball, and make a conical shape on both sides of the fan.

3) Glue the paper cone with the table tennis ball, draw a portrait on the table tennis ball with colored pencils, and the white tapered hat can also be decorated with familiar patterns or patterns for children. Such a cute tumbler is made.

In addition to this method, it can be made using a similar method using the bottom of the Sprite bottle (with the bottom tray removed) and the upper part of the bottle.

Homemade spin dryer reference lesson plan.

Teaching Objectives: Understand the movement principle of the spin dryer.

Able to make a simple spin dryer independently.

Teaching focus. Know the principle of centrifugal force and its application in life.

Teaching process. Centrifugal force, which refers to the force that arises from the center of rotation due to the rotation of an object.

Due to its inertia, objects in circular motion have a tendency to move in a straight line along the tangent of the circular trajectory. And this trend is to move away from the center of the circle, so it is called the "centrifugal phenomenon".

The principle of the dryer: the rapid rotation generates centrifugal force to throw the water out of the clothes.

The production process. Fix the motor inside the foam circle and connect the motor shaft to the transparent plastic shell of the spin bucket and the spin bucket. Connect the positive and negative poles of the battery box to the motor. Finally, it is fixed to the technology board. Press the battery turn on switch, and the small spin dryer you made yourself is complete.

Knowledge expansion. When a car makes a sharp turn, a centrifugal force is generated in the opposite direction. **Excessive centrifugal force when bending will lead to traffic accidents such as overturning. ）

When the rotor cup in the playground rotates, we feel a centrifugal force outside the image.

Homemade bai model electric motor. Enameled wire, magnet iron, battery, ZHI wire, pushpin, back DAO shaped steel needle, wood board plate.

Tape, knives. Right.

1.Wrap the enameled wire into a circular circle, about 15 or so, 2Then talk about the two sides of the half with a blade to scrape off the patent leather.

3.Then make a supporting bracket with a paper clip.

4.Use tape to attach the magnet to the board.

5.Fix the wire to the bracket with a pushpin, then turn on the 3V power supply and gently turn the coil. And then it turned.

You remind me of a British series called The Flying Thieves Season 6 Episode 5 of a small invention bug-killing that suits you quite well, I think haha.

DIY your own sub!

Materials: A plastic bottle with a narrow mouth, clay, a length of plastic hose, several coins, and tape.

1.Dig two or three holes in one side of the plastic bottle. On the same side of the bottle, tape three or four coins to secure them. These coins have a weight that allows the submarine to sink.

2.Put the plastic hose into the narrow mouth of the plastic bottle, and then use clay to seal the gap between the hose and the bottle mouth.

3.Put this toy submarine in a basin of water and fill the submarine with water.

4.Blow air into the submarine from the hose. As you blow, the water inside the submarine will be forced out of the hole.

5.When the submarine is inflated to a certain extent, it slowly rises to the surface.

All you have to do is control the amount of air inside the submarine to make the submarine float and sink in the water.

How so?

Air weighs less than water, and when you fill the submarine with air, the submarine becomes lighter than water, so it rises to the surface.

Homemade solar cooker Find a concave reflector bowl on a large flashlight, and use rigid styrofoam or wood to sharpen a cylinder about 4 cm long, with a diameter just enough to fit into the reflector. Drill a fine hole transversely at one end of the cylinder, insert a wire with a diameter equivalent to the diameter of the hole, and then fold the two ends of the exposed wire into 90°, leaving 5 cm each. Insert the cylinder into the hole in the reflector and insert the ends of the wire into a styrofoam or wooden baseplate.

Sharpen the two ends of a thin bamboo skewer, insert one end into the cylinder of the reflective bowl**, and insert a small piece of potato at the other end. Place the device in the sun so that the reflector is facing the sun, and then patiently adjust the length of the skewers so that the potatoes are in the right spotlight. It won't be long before the potatoes are roasted in the sunlight and give off their aroma.