We may have many differences among us; different classes, beliefs, countries, occupations, and even tastes, but one thing that all of us have in common is our microscopic blueprint… we are all made of atoms. This isn’t just shared among fellow humans; rather, it is the case for every...
How many elements follow the periodic law? How many main classifications of elements are there? What element is most abundant in the human body? How many elements have an atomic number of 42? How were the synthetic elements discovered? How many atoms can be on one element? How many chemical...
61. When did scientists come to realize how the atoms and molecules on the Earth combined to make living thing? A. 4 billion years ago. B.1953. C. After seven days.D. Many years later. 62. Scientists figured out that human bodies are basically made of . ...
we have chosen several topics, but there are many more. You may disagree with our choices. Discussion of sci-fi is always a good thing. We love sci-fi movies, TV shows, novels and short stories. Our goal is to inform, not to "pick on" a particular work. We realize that the ...
Red is the lowest-energy visible light, so in a red-hot object the atoms are just getting enough energy to begin emitting light that we can see. Once you apply enough heat to cause white light, you are energizing so many different electrons in so many different ways that all of the ...
Beyond logistics and cost are all the vast unknowns about how the human system could react to an atmosphere like Mars. Because Mars has no magnetic field, humans would receive whopping doses of cosmic radiation — not a problem on Earth, where the planet's magnetic field works to block it...
Power plants, cattle and cars are major contributors of greenhouse gases such as carbon dioxide and methane. Courtesy NASA The greenhouse effect happens because of certain naturally occurring substances in the atmosphere. Unfortunately, since the Industrial Revolution, humans have been pouring huge amount...
249. A___ has taught us what atoms are made up of and how powerful the atom bomb is. A.seamanB.salesmanC.naturalistD.Scientist 请仔细审题,看清楚题目要求,认真作答! 正确答案 验证码: 查看正确答案 试题解析 略 标签:249.A___hastaughtuswhat 本试题...
The first set of teeth that humans get are known as "baby teeth". They consist of 10 teeth on the bottom and 10 teeth on the top, for a total of 20 teeth. Eventually, these temporary teeth fall out and are replaced by the different types of adult teeth. The different types include ...
These researchers feel that intelligence is a combination of many factors. One theory that tries to provide a more complete view of intelligence is Howard Gardner's theory of multiple intelligences (MI). According to Gardner, there are seven types of intelligence: Linguistic Logical-mathematic ...