Material preparation: an old cardboard box (such as toy box, snack box), plasticine, latex, 2 sticks, a ruler, and an art knife.
Production process:
1, observe the appearance of the box, and if there is a beautiful appearance, it can be used as decoration. The smiling face is shown below.
2. Measure the size with a ruler and cut out the front of the car as shown in the figure.
3, the size of the cut waste is appropriate, and the range hood is made.
4. Dig a front windshield opening from the hood.
5. Paste transparent plastic as the front glass.
6. Stick the front cover on the car body, and the car body also digs out the left and right window glasses and sticks transparent plastic.
7. Make four wheels with plasticine.
8. Put the wheels on with sticks and install them on the car body, and the carton car will be completed.
Method of making submarine model of primary school students' manual scientific and technological works;
Materials and tools: plastic bottles, rubber bands, paper clips, beads, knives or scissors, 2mm electric drills, iron wires, markers and wooden strips.
The specific steps are as follows (* * * need 18 steps):
1. Take a coke plastic bottle and cut off the bottom with a knife, as shown below.
2. Buckle the bottom on the desktop and draw the propeller on the raised part of the bottom with a marker.
3. Cut off the propeller to get a special propeller.
4. Then drill a hole in the middle of the propeller.
5. Then drill an offset hole on the propeller and lock the paper clip.
6. Drill a hole in the center of the bottle cap.
7. Open a paper clip and keep a hook.
8. String the bottle cap, beads and propeller, and use beads between propeller and cover to reduce friction.
9. There should be a hook inside the bottle cap.
10. Insert the extra paper clip into the hole on the edge of the propeller.
1 1. Take out another plastic bottle and drill a hole in the center of the bottom.
12. Also drill a hole at the edge, as shown in the figure below.
13. Take another paper clip, pull it out and insert it into the hole in the middle of the bottle bottom, make a hook inside, and insert the other end into the hole on the edge to lock it.
14, take out a wire to make a hook, hook the rubber band, put your hand into the plastic bottle, and let the rubber band hook the paper clip hook at the bottom of the bottle.
15, then pull the rubber band out of the bottle mouth, hook it with the hook on the bottle cap, and tighten the bottle cap.
16. Fix two ice cream sticks around the bottle with two rubber bands as stabilizers and act as "fins" to ensure that the body remains still.
17, our simple submarine has been completed. If the bottle is filled with air, the propeller will emerge from the water. If the bottle is filled with water, it will become heavy, sink and cannot move.
18. Test different amounts of water in a bottle, try to make the propeller just sink into the water, and rotate the rubber band of the propeller to make it move forward like a real submarine.