1, prepare a piece of rectangular paper, the paper size is not limited, the bigger the paper, the bigger the car will be, and the medium size is suitable;

2. First, fold two vertical cross stars on both sides of origami, and then fold them into two overlapping triangles;

3. Then fold the two sides of the paper under the triangle inside, select one side of the triangle and fold it into a square;

4. Then bend the triangle on the other side back until it is inserted into the folded square two pages and flattened;

5. Finally, slightly adjust the paper racing car to make it look three-dimensional, that is, complete the simple chariot origami.

Knowledge expansion

Flame is a chemical phenomenon, which is usually produced by the reaction of combustible materials with oxygen. When the combustible is ignited, it releases heat energy, forming visible fire and invisible gas. The temperature of flame is usually very high, which can melt, burn or oxidize the surrounding substances.

The formation of flame requires three basic elements: combustible, oxygen and heat. Combustible can be solid, liquid or gas, such as wood, coal, oil or natural gas. When these combustibles are subjected to enough heat and oxygen, they will start to burn, releasing heat and light energy.

The shape and color of flame depend on the nature of combustible materials and combustion conditions. For example, wood will produce an orange flame when burning, and kerosene will produce a blue flame when burning. Different types of flames also have different temperatures and chemical reaction processes.

Flame is widely used. People use flame to heat objects, cook food, light, weld, cut and melt metals. However, flames are also dangerous. Improper use of flame may lead to fire, burns and other safety problems. Therefore, attention should be paid to safety when using flame, and relevant regulations and operating procedures should be observed.

In addition to its practical application, flame is also of great significance in the fields of science and art. Scientists use flame to carry out experiments such as chemical reaction and material preparation. Artists use flame to create beautiful works of art, such as welding and fireworks display.

In a word, flame is a chemical phenomenon of great significance. It is not only widely used in daily life and industrial production, but also has unique value in the fields of science and art. However, we also need to pay attention to the danger of flame and use it correctly to avoid safety problems.