Primary school students' award-winning scientific and technological production works, key point

Materials: nuts, matches, modeling clay, small strips of fabric.

Steps:

1. Put the tip of the nut on the fire and burn it for a while, then throw it into cold water. The nut will crack along the seams.

2. Break the walnut into two halves along the seam.

3. Remove the walnut kernels, leaving the shell empty, and stick a small piece of modeling clay inside the shell.

4. Use matches and a small piece of fabric with “Dream” written on it to make a sail and insert it into the playdough. In this way, a “walnut ship” carrying dreams can set sail.

You can fly your own little rocket at home

Launching a rocket is a very large and complex project, and the basic principle of its operation is inversion of thrust. Experiments based on the same scientific principles can also be carried out at home.In other words, anyone can make a small homemade rocket. In this final, candidate No. 1, Professor Song Xiangyang from Anhui, used very simple materials to launch a rocket on the spot.

There were only four experimental materials placed on the table, namely a piece of aluminum foil from a cigarette box, a sewing needle, a paper clip and a box of matches. Professor Song attached a sewing needle and a matchstick side by side, then wrapped the aluminum foil outside, tightly wrapped the needle and the matchhead together, and then took out the needle to sew and the main body of the rocket was ready. He then opened the paperclip at a 45-degree angle to take position, placed the “rocket” on the stand and waited for launch. But can it take off?

Professor Song lit a match and carefully lit the “rocket” on thestand. In an instant, the "rocket" was like an arrow, and with a whistling sound, a line of white smoke slipped through the air. In an arc, it flew more than a meter away. The entire audience applauded. Although this experiment may seem simple, Teacher Song tried it more than 3,000 times at home, searching for the most suitable matching weight and sewing needle thickness, and calculated a large number of parameters to achieve this effect.

Experimental principle: recoil principle - the match and the sewing needle in the "rocket" are placed side by side. Once the sewing needle is removed, the left channel is the jet port. When the fire is lit from outside the tin foil, the match head is heated and burns, and the burned gas is ejected along the nozzle, forming a recoil force, and the "flare" takes off. Today's jet planes and rockets all operate on this principle.

Paperr homemade soap

Hands are the most susceptible to bacterial infections during life, so we must develop a good habit of washing our hands. Let's make soap paper easy to carry and use.

Materials and tools:

Highly hygroscopic white paper, a small piece of soap, a writing brush and a disposable can.

Preparation method:

First chop the soap and put it in a jar. Fill it with an appropriate amount of water and heat the cup on the stove. When the soap melts, cut it. Remove the white paper. It's about the size of a matchbox. Apply the soap solution one by one, then remove it and dry it in the shade to become soap paper.

When you want to wash your hands, wet your hands with water, then gently rub them with the prepared soap paper to create foam, remove the dirt and put it on.n rinse with water.

Make a rabbit box

1. Take a plastic bottle (drink bottle, etc.) and draw an outline of a rabbit on the bottom (as shown in the picture).

2. Then cut along the line.

3. Use colored paper to cut out the rabbit's eyes, nose and whiskers, and stick them to the bottle with glue to make a storage box for the rabbit.

Let your children put their own gadgets inside to cultivate the habit of being organized.

Warm reminder: This must be done with the help of parents!

Make a small ladder

Warm reminder: This must be done with the help of parents!

1. First cut the plywood into A, B, C and D.

2. Make an opening at the bottom of B. The middle opening of C and D.

3. Insert the three thin strips as shown in the picture.

4. Nail A to the middle and top of B, mays be careful not to pin it dead and allow it to move freely.

5. Cut a crescent-shaped target board out of plywood and mark it with scales.

6. Cut out another small strip and attach it to A with all-purpose glue as shown in the picture.

7. Cut two circular pieces of equal size.

8. Drill four small holes on each side.

9. Cut a small slit on each side of A.

10. Tie the disk with a thin thread and the scale is ready.

Then you can use your imagination to decorate the small scale. After the experience, you can also use it as a small ornament. It really kills two birds with one stone!

Nut-shelled turtle

1. Materials and production tools

Scissors, calendar paper, glue, colored pens, nuts, etc.

2. Production method

1. Carefully split the walnut down the middle, divide it into dthem and take the intact half (Photo 1).

2. Take some old calendar paper (or other thick white paper) and cut out the turtle's head, feet, tail and body according to picture 2. The size of the body should be just enough to fit in the walnut shell .

3. Fold the head in half along the dotted line and stick it firmly with glue (Figure 3).

4. Glue the walnut shell to the body, then draw eyes on the head, and a realistic little turtle is ready.

A clean eraser with a brush

If you make a typo, use an eraser. After wiping, there will still be a lot of debris left on the paper. Whether you tap it with your hands or blow it with your mouth, it is unsanitary and embarrassing. Making a clean eraser won't be that complicated.

Materials: large eraser, trash brush.

Tools: scissors, glue.

Production method:

1. Dig a small holeshallow round on one end of the eraser 2. Remove the tip of the trash brush, wash it and dry it.

3. Cut the end of the brush tip to turn it into a small brush

4. Insert the tip of the brush into the small round hole of the eraser and stick it firmly with glue

Okay, the clean eraser is done. Each time you finish wiping the eraser, you can use a brush to gently "sweep" the debris off the paper and then pour it into the wastebasket.

Homemade wall flower basket

Materials and tools: two Sprite bottles, glue, cutting knife, scissors.

Production method:

1. Remove the green bottom cover from a Sprite bottle, cut it into a lotus shape, turn it over and glue it to the body of the bottle to form a base.

2. Cut a 2 cm wide green ring from the green bottom cover and always place it on the boxuseful.

3. Remove the neck from the bottle and cut a wide strip 13 cm long and 8 cm wide, as well as several narrow strips 3 cm wide.

4. Use a carving knife to carve patterns on the 3cm narrow strips as shown in Figure 3, then bend these narrow strips outward and insert them into the green ring from bottom to top.

5. Take another drink bottle, use the bottle body, and use scissors to cut 6 capsule sheets 17 cm long.

6. Nail the flower basket to the wall, insert leaves and flowers and the wall flower basket is ready.

The small-scale production methods and processes of high-tech products with technical content are complicated

Open the “water pump” to see**

Cooperation policy for water development in Germany It is of great importance in the world and was presentedwith three "pumps" in the German exhibition pavilion. By operating the "pump", the public starts a mobile phone and can find out about specific cooperation projects on the water bowl-shaped screen. The films document Germany's international cooperation projects in sustainable water supply and wastewater disposal.

Diamond water purification method

Using thin diamond film electrodes to purify drinking water is an innovative method that, according to experts, is very promising.

Water Template - Classic Water Heater Promotional Poster Template

(1) Two bottles (one with a tight-fitting lid)

(2 ) Two plastic straws

(3) Modeling clay

(4) Water

(5) Large nails

(6 ) Hammer

(7) Ruler

(8) Scissors

(9) Kitchen sink

With the help of an adult, uses nails to cut the bottle. Hammerz-two. straw-sized holes in the lid. Insert a straw into a hole and about half an inch into the hole. Insert the other straw into the other hole and about 5 cm in (see Figure 15-1).

Cut part of the second straw so that it remains 10 cm long above the lid. Use modeling clay to seal the space around the straw on the lid. Now fill the bottle halfway with water and tighten the cap (see Figure 15-2). http://www.llfxw.cn

Add water to another bottle and place it near the sink. Quickly turn the corked bottle over so that the shorter straw is inserted into the other bottle. Into Zi's water. You will see a fountain of water appear above the bottle (see Figure 15-3).

This is because the water flow in the longer straw weakens the air pressure in the bottle with the lid tight, and the higher air pressure at the toprface of the water in the open bottle pushes the water in the shorter straw upwards. , creating a fountain.

Content is reproduced from Chinese Teaching Aid Bar: http://llfxw.cn/article/show.asp?id=2089

A universal handwritten journal on water. . A handwritten journal on the water.

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Protect the Earth, save the use of sailors' copies

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The first grader copies the newspaper " Saving Water".

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It has become everyone's consensus to add watermarks to online images. Initially, the function is to prevent image theft and prevent your photos from being distributed. spread maliciously. Today's watermarks are becoming more and more sophisticated, and some can also be used to decorate and beautify photos. Of course, this is also because watermarks are relatively simple to make. For example, there are many cute graffiti ornaments embedded in "Meitu Xiu Xiu". " which can be used as materials for watermark production. , the author will now show you how to design your own watermark templateexclusive:

Tools/Materials

Beautiful images, how to create watermarks

Methods/steps

1. Open “Meitu Xiu Xiu” software, click “New” menu, create a new transparent canvas of appropriate size, then click “Apply”. . The length and width can be chosen according to your own choice, and you can choose the default first.

2. Then enter the "Accessories" menu, click on the "Cartoon Image" category, select your favorite accessory and adjust its size and position.

3. Then enter the “Text” menu, select “Enter Static Text”, select your preferred font under Web Fonts, enter some text, then adjust the size.

4. If you want to beautify the decoration, you can return to the “Accessories” menu, select the “Cute Heart” category and select the required accessory materials. After adjusting the size, yous can copy a few of them and roll them up for a correct composition.

5. After creating it, click "Save & Share" and select "png" format to save in the pop-up window. Then enter the “Accessories” menu and click “Import Accessories” to import the watermark prepared in “User Personalization”.

6. Finally, open a photo to be watermarked, enter the "Accessories" menu, find the watermark material you just imported in "User Customization", add it to the photo and adjust the position and size. , and you're done!

7. This way, everyone can create a watermark with a touch of design!

Compared to traditional gas water heaters, many people prefer water heaters electric storage water, so what are the most classic advertising posters forelectric water heaters? Below is a classic water heater poster template that I compiled for you!

Template water heater promotional poster design

Water heater brand promotional advertising words

1. . ——Alteran water heater

2. Enjoy the real feeling of bathing. ——Xinghui water heater

3. Warm your home from the heart. ——Ariston water heater

4. Maintain yourself every year and feel comfortable every day. ——Sakura water heater

5. The same sun, more hot water. ——Sun Rain water heater

6. The house is bright and full of joy. ——Guangguang electric water heater

7. Zero distance from hot water. ——Odik solar water heater

8. German quality, world leader. ——Biliqi water heater

9. The house is bright and full of joy. ——Guangguang electric water heater

10. THEsame sun, no more hot water. ——Sun Rain water heater

11 Where there is sun, there is Huayang. ——Huayang solar water heater

12. Security creates life. ——Advertising for Haier gas water heater

13. Heat your home. ——Sakura Industrial-Sakura Constant Temperature Water Heater

14. ——Ruiqishi electric water heater