CBSE Class 12 Term 2 English Important Questions 2022: FAQsĬlass 12 English Term 2 Important QuestionsĬlass 12 English Term 2 Important Questions will help students to get extra marks in their main examination.Class 12 Term 2 English Important Questions: On The Face Of It.Class 12 Term 2 English Important Questions: Should Wizard Hit Mommy?.Class 12 Term 2 English Important Questions: Aunt Jennifer’s Tigers.Class 12 Term 2 English Important Questions: A Thing Of Beauty.
Class 12 Term 2 English Important Questions: Indigo.Class 12 Term 2 English Important Questions: The Rattrap.Class 12 Term 2 English Important Questions: Report Writing.Class 12 Term 2 English Important Questions: Letter Writing.Class 12 Term 2 English Important Questions: Reading Comprehension.Class 12 English Term 2 Important Questions.NCERT Solutions For Statistics Class 11.We humans, in turn, burn that fossil fuel and put the carbon back into the atmosphere. Plants that die and are buried may turn into fossil fuels like coal or natural gas. At some point the plant will die and decay (or get eaten by another organism). Plants use sunlight and carbon dioxide from the atmosphere to make their own food and grow. These methods include photosynthesis, animal respiration, plant respiration, and the decay process. This natural recycling program is the carbon cycle.īasically the Earth has tons of different way to push carbon from one system to another. In a sense, the Earth has a fantastic recycling program set up for its favorite element. How does carbon get from point A to point B? How does it go from being inside an organic thing to an inorganic thing? Carbon moves through the Earth's system from living to non-living things in many different ways. For this reason CO 2 is called a greenhouse gas because it makes Earth act like a giant greenhouse.Ĭarbon dioxide is a greenhouse gas. It prevents heat from escaping Earth and warms up the atmosphere. It's a vital and essential component of our atmosphere. One of the most important forms of carbon is carbon dioxide (CO 2). The non-living objects are called inorganic and are things like rocks, shells, the atmosphere, and oceans. We call these living carbon-containing things organic. It's found in both living and non-living things. There is a fixed amount of carbon on the planet. So what happens to the carbon when something dies? The answer is the carbon cycle. Like all matter though, carbon cannot be created nor destroyed. Fortunately carbon is one of the most abundant elements on our planet so there is plenty of life to be lived. Nature uses carbon in virtually all forms of life on Earth. They won a Nobel Prize in 1956 (Physics)"for their researches on semiconductors and their discovery of the transistor effect." 16 Check out more about their award winning work here.Ĭarbon is Nature's favorite Lego piece. The pioneers of semiconductor research were William Bradford Shockley, John Bardeen, and Walter Houser Braittain. See the Silicon Valley and some of the companies that are located there here. These companies have revolutionized the world of electronics thanks to silicon and other semiconductors. It's actually a place near San Francisco where a lot of technology companies were founded. Have you ever wondered where or what Silicon Valley is? No, it's not some mythical stash of elemental silicon tucked in between two mountains. Want to learn more about the physics of semiconductors? Check out this website.Ĭurrently most semiconductor devices are composed of silicon (Si). We would be sad if semiconductors did not exist. We (along with our iPhones) are the masters of electron.īeing able to control electron flow is the foundation of modern electronics. This special conductivity behavior allows us to manipulate how, where, and when electrons flow. Because their conductivity is lower than that of metals, the semiconductor wizards have found that their conductivity can be turned on and off. Don't let that stop them from doing their thing. This ability to "turn on" or "turn off" conductivity is the basis of being a semiconductor.Ī semiconductor is a material that has mild conductivity compared to a metal. What about the elements that are neither metal nor non-metal? The metalloids, as they are called, can sometimes act as a conductor while other times it cannot. This means heat and electricity can flow through them easily. We've already learned about metalloids and how they're also known as semiconductors, but what is a semiconductor? Inquisitive minds want to know. The What, Whys, and Hows of Semiconductors
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