Infrared is a type of radiation that is actually invisible to the human eye, but when it is absorbed it produces heat. We can detect this heat by looking atinfraredspectrums, which are emitted when the atmosphere is warmed by the sun or by lightning. It has been calculated that every squ...
and its volume is about 1.3 million times that of the Earth. Its weight is about 2×1030kg, which is estimated to be about 330,000 times that of the Earth. According to the composition of chemical elements. The sun consists of hydrogen, helium, oxygen, carbon, neon,...
you see growing on them. Nitrogen helps plants photosynthesize, which is a process that involves using energy from the sun to break down water and carbon dioxide so that sugars are formed. These sugars are then used as food for the plant, and the byproduct of the process is oxygen. ...
★ The earth revolves around the sun.★ 地球围绕太阳转。◇ For negative and question sentences否定句和疑问句:◇ The auxiliary verb DO is conjugated in the Present Simple: do/does ◇ 使用助动词DO的一般现在时形式：do/does ◇ The main verb is invariable in base form.◇ 主动词使用动词原形。...
We all know that there is no air in space, and therefore no oxygen to burn. In our everyday experience, the only burning most of us are familiar with is fire combustion. But that is not the only type of reaction;the sun is indeed burning, but it is anuclearreaction, not achemicalon...
[单项选择题]—Does David often come to school()bus —Yes, but sometimes he comes()his father’s car. 关键词: school father Sometimes A. take; in B. by; by C. by ; in D. in; with 本题来源:2015年安徽公共英语考试考前冲刺卷(2)...
The Sun's rays have to travel a shorter path through Earth's atmosphere in the day. This is why the sky looks blue during the day. ©iStockphoto.com/bluejayphoto Blue Skies And Yellow Sun When sunlight strikes gas molecules, such as nitrogen and oxygen, light of longer wavelengths, lik...
With each breath, your lungs pump oxygen into the bloodstream and remove carbon dioxide. Why does oxygen get its own organ system? This is especially puzzling because oxygen can transform cellular molecules into toxic compounds. That oxidation power, it turns out, is exactly why our cells need ...
Forests are largely green, which means that they can absorb more or less of the sun's energy than the ground under them would. This can have an... Learn more about this topic: Koppen Climate Classification System, Zones & Map from ...
the dominant process is a "CNO cycle" that also involves atoms of carbon, nitrogen and oxygen. But for stars such as our sun, the dominant process is the "proton-proton" chain reaction.