The sun is mainly made up of ___. A. oxygen and nitrogen B. hydrogen and helium C. carbon dioxide and water vapor D. iron and nickel 相关知识点: 试题来源: 解析 B。太阳主要由氢和氦组成。“oxygen and nitrogen”是氧气和氮气,“hydrogen and helium”是氢和氦,“carbon dioxide and wat...
It gives us light and heat. Without the sun, life on Earth would not be possible. What is the sun mainly made of? A. Hydrogen and helium. B. Oxygen and nitrogen. C. Carbon and oxygen. D. Water and air. 相关知识点: 试题来源: 解析 A。解析:太阳主要由氢和氦组成。反馈 收藏 ...
"A direct measure of solar activity is the number of sunspots on the surface," Reinhold said. "Finding such stars with very similar parameters as our sun but being five times more variable was surprising." The sun -made up mainly of hydrogen and helium-is an average-s...
什么是太阳(What is the sun) The sun is a normal star, and there are about 100 million such stars in the Milky Way. Diameter: 1,390,000 km. Quality: 1.989e30kg Temperature: 5800 open (surface) 15.6m (core) The sun is the largest object in the solar system. It has 99.8 percent of...
The Elements of the Periodic Table.There is Hydrogen and Helium.Then Lithium,Beryllium.Boron,Carbon everywhere.Nitrogen all through the air.With Oxygen so you can breath.And Fluorine for your pretty teeth.Neon to light up the signs,Sodium for salty times,Magnesium,Aluminium,Silicon,Phosphorus then...
Saturn is made mostly of hydrogen and helium(氦) gas. Saturn is about 74,898 miles in diameter(at the equator). This is about 9.4 times the diameter of the Earth. 764 Earths could fit inside a hollowed-out Saturn. Saturn is the most oblate planet in our solar system. It has a ...
2.根据第三段内容可知,“ Jupiter's atmosphere is special because it is the solar system's largest atmosphere. It is mostly made up of hydrogen(氢气) and helium(氦气). ”木星的大气层很特别,因为它是太阳系中最大的大气层。它主要是由氢(氢气)和氦(氦气)。故填Because it's made mainly of gas...
theremainingmass). Thesunwaspersonifiedinmanymyths:theancientgreekscalled itHelios,andtheRomanscalleditSol. Thesun'smassismadeupof75percenthydrogenand25percent helium(92.1percenthydrogen,7.8percenthelium);Thetotal numberofothersubstances("metals")isonly0.1percent. ...
Rolla - July 17, 2002 - For years, scientists have assumed that the sun is an enormous mass of hydrogen. But in a poster presentation to be delivered July 21-26 at the Meteoritical Society's annual meeting in Los Angeles, Dr. Oliver Manuel says iron, no
The source of the Sun's energy is fusion.The Sun is made up of about 75 percent hydrogen and 25 percent helium. Through nuclear fusion, the Sun... Learn more about this topic: Convection Zone of the Sun | Definition & Overview