Why can white light be separated into different colors? What does this "web on the surface of the Sun" image reflect? D) Individual protons are joined into long chains of protons. C) The chromosphere and corona are both best studied with visible light. lucky1742. So why does the sunspot look darker than the surrounding area? A) 4 billion years B) 25 million years C) 10,000 years D) 400 million years Answer: A 2) The Sun will exhaust its nuclear fuel in about A) 5000 AD. B) The problem arose only because experimental data were being misinterpreted; on re-examination, the old data showed that the expected number of neutrinos were being detected. D) The core would heat up, fusion rates would increase, and the core would re-expand. C) Nuclei have to be very hot in order to fuse, and the only way to get them hot is to bring them close together. A) There's no such thing as a solar neutrino. C) The radiation produced by fusion reactions that is trapped in the core gradually raises the temperature, increasing the rate of fusion. A) As the Sun was forming, nuclear fusion reactions in the shrinking clouds of gas slowly became stronger and stronger, until the Sun reached its current luminosity. Answer: The Sun formed from a cloud of gas. B. B) remain stationary. Please subscribe to view the answer, Which of the following describe sunspots? Also, this is a. I see. B) millions of degrees. Sunspots on the photosphere of the sun appear dark because the temperature of the sunspot region is comparatively cooler than the temperature of the sun's surrounding areas. If you were to put a sunspot in the night sky, it would glow brighter than the Full Moon with a crimson-orange color! group of answer choices two over one three over two two over two two over three, Read the article and answer the question. C. They are transparent and let us see deeper, darker layers. The remaining 4 million tons of mass is A) ejected into space in a solar wind. What happens to the positron? He didnt know exactly why that happened. , a known mass of alcl3? What prior research was done here? C) extremely hot plasma flowing along magnetic field lines. D) an alternative way of generating energy that is different from the fusion of hydrogen into helium. Sunspots appear dark (in visible light) because they are much cooler than the rest of the surface of the Sun. A) strong force B) weak force C) electromagnetic force D) gravitational force E) none of the above Answer: A 23) The first step in the proton-proton chain produces an antielectron, or positron. Explain. A) The core would cool off and continue to shrink as its density increased. Why Do Sunspots Appear Dark in Pictures of the Sun? Which of the following best describes what would happen? When the magnetic field becomes twisted and tangled, energy stored in the system is released through electrical currents. C) It is rapidly converted to energy when it meets an ordinary electron, resulting in matter-antimatter annihilation. Answer: A 18) Which statement best describes what was called the solar neutrino problem? A) Gravitational contraction involves nuclear fusion, which generates a lot of heat. A) The Sun is generating energy other than by nuclear fusion. Acceleration resulting from gravity is9.8m/sec. They do not emit any light. All known energy sources were eliminated and only after the recognition that mass can be converted directly into energy, was the solution of the Sun's light as nuclear energy understood. This difference in emitted radiations causes the sunspot to appear dark. You will then reach the source of these photons, the core of the Sun, which is actively involved in nuclear fusion, converting hydrogen into helium and releasing multitudes of photons and neutrinos. The rate of fusion then determines how many neutrinos should be produced by the Sun, and theories estimate how many of these should be detected here on Earth. Sunspots have a lower temperature compared to the surrounding photosphere, which causes them to emit less light and appear darker. A) The number of sunspots peaks approximately every 11 years. B) a bubbling pattern on the photosphere. Why does phytoplankton live in the photic zone? A) It was important when the Sun was forming from a shrinking interstellar cloud of gas. The rest of the solar surface is constantly being replenished by convective cells that reheat it. *Which of these layers of the sun is coolest? A) Higher temperature would cause the rate of nuclear fusion to rise, which would increase the internal pressure, causing the core to expand and turn the Sun into a giant star. Answer: C 22) Which of the following is not a characteristic of the 11-year sunspot cycle? We can measure the luminosity that the Sun is producing and therefore determine how much fusion must be going on in its core. D) core. For example, NASAs Solar Dynamics Observatory launched in 2010 is designed to help provide answers to questions ranging from how the Sun works to its influence on the environment here on Earth. *Solar energy leaves the core of the Sun in the form of. Where Does Glycolysis Take Place In The Cell? A. Why is there little heat retained in the warm thermosphere? Learn about differentiation rotation and sunspot cycles. Thus, the sunspot region appears dark compared to its surrounding region. E ) 4 H ! Sunspots - Windows to the Universe They are masked by dust and gas passing between Earth and the Sun. While sunlight travels through the hotter parts of the sunspot, it exits through the cooler parts. Why are gamma rays more dangerous than radio waves? Therefore, scientists predict that neutrinos should come from the Sun if fusion is occurring in its core. C) billions of degrees. Raj's shadow is 10 feet long when the angle of elevation of the sun is 32. A) the bubbling pattern on the photosphere produced by the underlying convection B) another name for the way sunspots look on the surface of the Sun C) elements in the Sun other than hydrogen and helium D) dust particles in the Sun that haven't been turned into plasma E) lumps of denser material in the Sun Answer: A 37) What are coronal holes? Almost done! Why are lunar eclipses observed more frequently than solar eclipses? Close up, youll see that a sunspot has a central dark areacalled the umbra, which appears dark because its cooler than the rest of the Suns surfacewith some lighter spots, and that center is surrounded by a lighter filamentary area, called the penumbra, that flows outward. | READ MORE. D) The number of sunspots on the Sun at any one time gradually rises and falls, with an average of 11 years between the times when sunspots are most numerous. Answer: C 2) When is/was gravitational contraction an important energy generation mechanism for the Sun? But since the sunspot is cooler than its surroundings, it absorbs less light. B) gravitational contraction. Answer: FALSE 7) Energy from the core of the Sun first travels slowly through the convection zone and then much faster through the radiation zone. Why are coral reefs located near the equator? Answer: B 5) How does the Sun's mass compare to Earth's mass? A) About a thousand trillion neutrinos are passing through your body every second. As far back as 1610, Galileo Galilei observed sunspots and noted that they appeared redder than the background color of the Sun. Why do sunspots appear dark? - Short-Fact B) plasma. As for the reason it is cooler than the rest of the surface: Although the details of sunspot generation are still a matter of research, it appears that sunspots are the visible counterparts of magnetic flux tubes in the Sun's convective zone that get "wound up" by differential rotation. The best answers are voted up and rise to the top, Not the answer you're looking for? Get the latest Science stories in your inbox. A) The Sun's surface is boiling. Answer: A 9) Every second, the Sun converts about 600 million tons of hydrogen into 596 million tons of helium. E) join together to form a nucleus. Ultraviolet rays in sunlight stimulate the production of melanin. Answer: C 19) How can we measure the strength of magnetic fields on the Sun? What is the law on scanning pages from a copyright book for a friend? answered Why do sunspots appear darker than their surroundings? Youll find sunspots mostly during active periods of Solar Cycle 24, which began in April 2014. Explain why do 5 solar mass stars form planetary nebulas, (thus shedding their mass and allowing them to turn into white dwarfs) but 10 solar mass stars do not? D) reabsorbed as molecular hydrogen. The temperature of the sunspot can vary in the range of 3000 to 4000 K which is about 2000 K cooler than the temperature of the suns surrounding surface (5,778 K). See answers Advertisement daaccey They are cooler than their surroundings and they're cooler because of the intense magnetic fields in them Advertisement TheGhettoPug They appear darker because they are are much cooler than the rest of the surface (b) radiation and elements like carbon and nitrogen. The surface of the Sun is a very busy place. A) They have a tendency to pass through just about any material without any interactions. But when it hits a colder object, such as ice, the light speed doesnt slow down as much. Why are the Arctic and Antarctic classified as deserts? They appear dark because they have a lower temperature compared to the surrounding regions of the solar surface. Why do plants transpire more in the light? During this time, other researchers tried to explain away this observation using explanations such as magnetism, convection, coronal loops and prominences. Jeffrey Bennett, Megan Donahue, Nicholas Schneider, Why do sunspots appear darker than their surroundings? Solar flares are a sudden explosion of energy caused by tangling crossing or reorganizing of magnetic field lines near sunspots. Answer: C 35) Most of the energy produced in the Sun is released in the form of visible light from the photosphere. Sunspots are areas that appear dark on the surface of the Sun. One would be hot inside; the other cold. Answer: We observe the Sun to exhibit a sunspot cycle over a period of 22 years, tied directly to its magnetic activity. In between them would be a thin layer of air that wasnt quite hot enough for either ship to reach. @RobJeffries It might have received so many upvotes because it appears on the first page of Google for "sunspots dark". Why do sunspots appear darker than their surroundings? D) By measuring Doppler shifts, we observe vibrations of the Sun's surface that are created deep within the Sun. Answer: B 21) Which of the following choices is not a way by which we can study the inside of the Sun? A) The hydrogen gas in the Sun is balanced so that it never rises upward or falls downward. As magnetic activity increases, the sunspots form lower down and in greater numbers. Core (of the sun) Nuclear fusion of hydrogen into helium occurs in the core. B) They actually are fairly bright but appear dark against the even brighter background of the surrounding Sun. B) With each subsequent peak in the number of sunspots, the magnetic polarity of the Sun is the reverse of the previous peak. B) We can make a computer model of the Sun's interior that allow us to predict the observable properties of the Sun. Help identifying an arcade game from my childhood. $ $ 4$ 6$ d$ f$ $ $ $ $ % % - - B/ C/ j/ / |1 1 3 3 4 4 7 7 . E) neutrinos from the solar core reach the solar surface easily. If the solar core were to increase in temperature, the nuclear fusion rate would soar, generating excess energy that increases the pressure and pushes the core outwards. So when sunlight passes through a medium, such as glass or water, the light slows down. B) Fusion in the Sun's core creates neutrinos. They appear dark just due to the relative difference in the temperature of sunspots and the surrounding temperature. It only takes a minute to sign up. E) Energy is conserved so while the gas moves up and down, there is no net transport of energy. 2. radiation and elements like carbon and nitrogen. Answer: TRUE 3) The Sun generates energy primarily by nuclear fission. Sunspots | Center for Science Education Save my name, email, and website in this browser for the next time I comment. D) The convection zone is the source of ultraviolet light, and the upper photosphere is the source of X rays. Answer: B 30) Why are neutrinos so difficult to detect? . Answer: TRUE 11) The Sun's rate of fusion is gradually increasing over time. Explain. And its increasingly important work: as solar and space physicist Daniel Baker of the University of Colorado noted in Irions story, The Sun is a highly variable star. A small machine tool of mass 100 kg operates at 600rpm. D) It is important during periods when the Sun is going from solar maximum to solar minimum. Cookie Policy A) the electromagnetic force and gravity B) outward pressure and the strong force C) outward pressure and gravity D) the strong force and gravity E) the strong force and kinetic energy Answer: C 5) What is the Sun made of? On average, sunspots are located near the equator. A) The Sun's mass is about 300 times the mass of Earth. C) The Sun generates energy through nuclear reactions while nuclear power plants generate energy through chemical reactions. D) No one knows: this is the essence of the "solar neutrino problem." If you enjoyed reading this article and would like to see similar ones. 2. four electrons 1. 2. chromosphere 1. A) core, radiation zone, convection zone, corona, chromosphere, photosphere B) core, convection zone, radiation zone, corona, chromosphere, photosphere C) core, radiation zone, convection zone, photosphere, chromosphere, corona D) core, corona, radiation zone, convection zone, photosphere, chromosphere Answer: C 9) What are the appropriate units for the Sun's luminosity? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Theories predict how many and what type of neutrinos should be observed. C) Our understanding of fusion in the Sun suggested that neutrinos should be destroyed before they arrive at Earth, yet neutrinos were being detected. C) nuclear fusion of hydrogen into helium. Sunspots are areas of intense magnetic activity on the Sun, where the magnetic field is strong and complex. Sunspots are regions on the sun's surface that appear darker than their surroundings. Why isn't the sun marked on a planisphere? Sunspots: What are they, and why do they occur? | Space Why are scientists so interested in solar neutrinos? D) It predicted that Earth would also shrink in size with time, which would make it impossible to have stable geology on our planet. What are the mechanical property and processing trends? For example, by detecting solar neutrinos we can learn more about the fusion that is going on within the Sun's core. Answer: C 7) The Sun's surface seethes and churns with a bubbling pattern. A sunspot isnt really black or white as we tend to think of darkness and light. Why does exposure to the sun result in darker skin, even though there is no increase in the number of melanocytes? Sunspots appear dark because they are "cooler" than the surrounding gas of the photosphere. C) a hundred years ago. Why do protons and photons effect cancer genes? D) We see many sunspots on the surface of the Sun. A ) T h e S u n b e c o m e s l e s s e f f i c i e n t a n d m u s t i n c r ease the rate of fusion to produce the same amount of energy. NATS 1740 Assignment 15 Flashcards | Quizlet you made running a blog look easy. 1. Answer: FALSE 4) Nuclear power plants on Earth create energy in the same way as the Sun. As the pressure applied by the gases is reduced, the temperature of the gases also gets reduced because according to the van der Waals equation, cooler gas exerts less pressure as compared to the hot gas. Answer: C 14) The proton-proton chain is A) the specific set of nuclear reactions through which the Sun fuses hydrogen into helium. . ectly over the car. and they're cooler because of the intense magnetic fields in them, A car is traveling north on a straight road at 20 m/s and a drone is flying east at 6 m/s at an elevation of 25 m. At one instant the drone passes dir This explains why sunspots appear darker. Find the static deflection of an undamped isolator that provides 90% isolation. B) The Sun emits light of longer average wavelength. The sunspots are actually many thousand degrees cooler in comparison to the surface of the Sun and comprise gases at temperatures of 3000 to 4000 K. The sunspots seem darker as they are darker in comparison to the surrounding surface, they are darker as they are cooler, and they are cooler due to the presence of intense magnetic fields. That gap of air exists everywhere on the Sun except where a sunspot forms. E) composed of iron. You probably noticed it when you looked at the sun during a total solar eclipse that tiny dark spot amid all those bright spots (or maybe next to one of them). What was the major drawback of this idea? However, indirect exposure allows the light to exit through the cooler parts of the sunspot. Sunspots appear darker than their surroundings because they are cooler than their surrounding environment. At the center of the Sun, fusion converts hydrogen into (a) plasma. B) Fusion reactions decrease the overall number of particles in the core, causing the core to shrink, converting gravitational potential energy into thermal energy, and increasing the rate of fusion. This decrease in the temperature of gases lowers the visible radiations emitted from the sunspot. D) radioactive elements like uranium and plutonium. Another idea was that the Sun shone through chemical burning (like a conventional fire on Earth), but this was dismissed because it could not generate and sustain sufficient brightness. However, we detect far fewer than expected. Typical sunspots have a dark region (umbra) surrounded by a lighter region, the penumbra. A) Nuclei normally repel because they are all positively charged and can be made to stick only when brought close enough for the strong force to take hold. Understand the meaning of umbra, penumbra, and Maunder Minimum. D) The chromosphere and corona are both best studied with radio telescopes. A) The chromosphere is the source of ultraviolet light, and the corona is the source of X rays. Answer: E 32) What is a possible solution to the solar neutrino problem? 1 C + e n e r g y . 4 H e + e n e r g y . D) Coronal mass ejections and other activity associated with the sunspot cycle can disrupt radio communications and knock out sensitive electronic equipment. B) It rapidly escapes from the Sun, traveling into space at nearly the speed of light. The answer lies not on Earth but on our star. As the gas pressure decreases, their temperature also decreases which creates a temperature difference in the sunspot and its surrounding area. At the beginning of the period, sunspots form at higher latitudes. Sunspots are dark, planet-sized regions that appear on the "surface" of the Sun. This means that sunspots are only about a third as bright as the surrounding photosphere, and it's this contrast in brightness that makes them appear dark, even . 12) Process of Science: How do we know what is going on in the center of the Sun so well if we cannot see it or send spacecraft to it? While sunspots have a temperature of about 6300 F (3482.2 C), the surface of the sun which surrounds it has a temperature of 10,000 F (5537.8 C). Also, this is a self-answered question, a feature of the system which users are encouraged to utilize. A n s w e r : E 2 5 ) W h y m u s t t h e S u n ' s r a t e o f f u s i o n g r a d u a l l y r i s e o v e r b i l l i o n s o f y e a r s ? D) repel each other. Required fields are marked *. It would be interesting to see the structure of the area which is black on most pictures. Why do white-cheeked gibbons change colour? D) There is a balance within the Sun between the outward push of pressure and the inward pull of gravity. Why do animals live in the sunlight zone? A longer lived source that could match the energy requirements is gravitational contraction. Why do sunspots appear darker than their surroundings? I'll look for some, although I somewhat doubt I'll find any. We live in its outer atmosphere, and the cyber-electric cocoon that surrounds Earth is subject to its whims. The energy requirements are much larger than chemical reactions (i.e., fire) so this was then ruled out. They are cooler than their surroundings. Why do sunspots appear darker than their surroundings? - Numerade A) They are too cold to emit any visible light. C) They have no mass. Answer: A 17) How can we best observe the Sun's chromosphere and corona? You will then enter this convective layer, feeling regions of hot plasma rising upward to meet you and seeing cooler gas descending from the surface. And if you saw it again later, you might notice something else about these spots: Theyre darker than everything around them. Why do some animals of the Arctic region have white fur. However, as geologists and paleontologists found evidence for an ancient Earth, astronomers realized that gravitational collapse could not be the dominant energy source of our Sun today. A) It slowly works its way to the Sun's surface, where it escapes into space. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I think this is one of the most vital information for me. This phenomenon is similar to how paint is applied differently depending on whether it is being used on a wall or on paper. D) The Sun has exhausted its supply of neutrinos. Wow, amazing blog format! D) It predicted that Earth would also shrink, which would make it impossible to have stable geology on our planet. Why do sunspots appear darker than their surroundings? They appear dark because they are cooler than other parts of the Sun's surface. Indeed the second block quotation that you use is actually from the wikipedia page for sunspots, not from the NASA resource you cite. E) The rate of fusion is not rising; it is actually decreasing over time. Why do scientists use synchrotron radiation? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. , The given unity feedback system shown in Figure 2 with G(s)=s(s+7)K is operating with 15% overshoot. Scientists dont fully understand why the cycles occur, but some theories propose that they serve as a way for the Sun to release energy built up over time. Highest density to lowest: photosphere, chromosphere, corona. Sunspot - Wikipedia As with any other sunspot, theres an inner part that gets brighter while the rest of the surface gets dimmer. On Sunday (July 2), one of these sunspots, the darker, cooler areas on the star's surface that feature dense, strong magnetic fields, produced a powerful solar flare, an energetic flash of light . Chapter 10: Our Star Flashcards | Chegg.com I just wanted to ask if you ever have any trouble with hackers? The study supports the idea that sunspots occur as hot gases rise to the surface of the Sun and spread out, cool and then flow back into the star. C) another name for the force that holds protons together in atomic nuclei. C) It has played a role throughout the Sun's history, but it was most important right after nuclear fusion began in the Sun's core. A) We can probe the interior of the Sun by studying the vibrations in its photosphere. This . Why are sunspots black? | BBC Science Focus Magazine As you approach the Sun, you will enter the corona, an extremely hot layer of gas, but so low in density that you won't really feel how hot it is. Sunspots also have a lighter outer section called the penumbra, and a darker central region named the umbra. Why do sunspots appear darker than their surroundings? Why do sunspots appear darker than their surroundings? C) This is another way of stating that the Sun generates energy by nuclear fusion. 6) Describe two general ways we learn about the Sun's interior. nobel prize 1911 name the scientist who was awarded the nobel prize in chemistry in 1911 and describe the co Kardinal Stick 2020 ? B) The chromosphere is best observed with ultraviolet telescopes and the corona is best observed with X-ray telescopes. All in all, the sunspots appear darkbecause the are darker than thesurrounding surface. The strength of the magnetic field in the sunspot region is almost 1000 times stronger than the average magnetic field on the suns surface. Because they are cooler, they emit less thermal radiation per unit area and therefore look dark in contrast to brighter surrounding regions. A more modern hypothesis was that the Sun shone through the emission of thermal energy resulting from gravitational contraction, but this could only last for about 25 million years, far less than the age of Earth, before the Sun would have contracted to a point.
Savoy Place Pensacola,
Why Does Billy Hate Lucas,
Lawrence County Il Arrests,
I-55 Accident Bloomington Il Today,
Articles W
