The sun gives us light and heat. It is very important to life on Earth. How does the sun give us heat? A. By burning fuel B. By nuclear fusion C. By magnetic fields D. By E. lectric currents 相关知识点: 试题来源: 解析 B。解析:根据科学常识,太阳通过核聚变产生热量,这是科学事实。
题目The sun is a star. It gives us light and heat. How far is the sun from the earth? A. 150 million kilometers B. 100 million kilometers C. 200 million kilometers D. 50 million kilometers 相关知识点: 试题来源: 解析 A。本题考查对太阳与地球距离的常识,太阳距离地球约 1.5 亿...
The sun is a star. It gives us light and heat. How far is the sun from Earth? A. 150 million kilometers. B. 500 million kilometers. C. 1 billion kilometers. D. 5 billion kilometers. 相关知识点: 试题来源: 解析 A。太阳距离地球约 1.5 亿千米。选项 B、C、D 的距离与实际不符。
If the sun has enough power to warm and light the whole earth,it must have enough power to do other things,too.Can we use the sun’s abundant energy to supply electricity,or at least to perform the functions which electricity or other types of power usually perform?The answer is yes....
What does it mean to be green? “Green” is more than just a color. It also means taking special steps to protect the environment—the water, the land, and the air we breathe. Why green? Plants are green, and without them the earth wouldn’t be such a lovely home for us human ...
Does the sun rotate? Why does the sun send out solar flares? Will the burn out? (And if so, when? And what will happen to Earth and its inhabitants when the sun dies?) Let's look at the parts of our nearest star, find out how it makes light and heat and explore its major feat...
Related:When will the sun die? You may like Where does the sun's heat come from? The sun is made ofgas and plasma. Most of the gas — 92% — is hydrogen. If the sun were smaller, it would just be a huge ball of hydrogen akin toJupiter. According to NASA Space Place, the hydr...
Here is how to make it.First, prepare two tomatoes and two eggs. Wash the tomatoes and cut them into small pieces. Then, break the eggs into a bowl and stir them evenly.Next, heat some oil in a pan. Pour in the beaten eggs and stir-fry them until they are set. Remove the eggs...
But when you go solar, your utility may need to either replace your traditional meter or add a second dual-direction meter that measures how much solar power you produce and send back to the grid. This also helps the utility determine how much to credit you, if a net metering or similar...
how does the man say his proposal about retirement can be carried out? 【section c】 passage 1 音频原文 new research from america studies the role that the presence of individuals from different social or racial groups ...