A few science and nature questions. Some interesting natural science questions

2.The smaller the slope of the slope, the more effort is (less effort). Sound is produced by vibration. The Milky Way and all the galaxies are called (total galaxies).

The two planets adjacent to the Earth are the (Venus) and () stars. (Ginkgo biloba) is known as the "giant panda of plants" (I'm not sure). Answer: In a vacuum, sound is (cannot be transmitted).

Answer added: If the ore is shallow buried. with (open-pit mining) methods; It is buried deep and needs to be mined (underground). (Not sure).

Take off your sweater in a dark room in winter. There will be a crackling sound and sparks, which is a (static) phenomenon.

The food link between plants and animals is called the food chain. It intertwines with each other to form (food webs).

Periscopes are made using the (reflective) principle of light.

The two planets adjacent to Earth are Venus and Fire.

Transpiration of stems) is the main driving force for plants to absorb water and nutrients. A device that uses an electric current to generate magnetism is called an electromagnet. Answer added: Now I know that I'm also asking my own questions, and you can check the rest on the Internet.

The answer is supplemented by a complete one-step machine that includes four parts: processor, memory, input and output devices, and external devices. (Not sure, maybe it's a computer.) Answer supplement It's better for you to go up and ask, there are a lot of people there, and there can be about a dozen in an afternoon.

What, to be specific, is it to mention or what.

Categories: Education, Science, >> Science & Technology.

Problem description:1Antarctica is the coldest place in the world, so the atmosphere in the Antarctic region is very ( ) "dry" or "wet". Why?

2.In winter, when you stay in an air-conditioned room for a long time, you will feel discomfort such as dry throat, what is the main reason?

3.Generally in industrial areas, there are more opportunities for fog to form in urban centers, do you know why?

Analysis: 1. Drying. The concept of humidity is the presence of moisture in the air. In Antarctica, the temperature of the air is below freezing, and it is difficult for water vapor in the air to exist. So the limbs are uproaring, dry!

2. In winter, the weather is relatively dry, and the higher temperature generated by the air conditioner does not bring higher humidity, so physical discomfort such as dry throat will occur.

3. The cause of fog is that the suspended particles in the air are coated with water vapor. There are more suspended particles emitted in the city of industrial history, so fog often occurs.

Hello! (1) b

2) Solution: Set CO2 x kg emissions

C2H5OH+3O2=Ignition=2CO2+3H2O46 88xx=

3) 6CO2 + 6H2O == Chloroplast Light ==== C6H12O6 + 6O2