A) Energy is produced in the convection zone by thermal radiation. E) because they are so small. They tend to cluster at high solar latitudes. 2. D) a thousand years ago. Reset Help deep-ocean trenches 1. an extremely regular build-up and decay of the number of. A magnet, for example, may attract another thing. The neutrinos are of the wrong type (muon neutrinos, instead of. B) They are extremely rare. in your Student ID# and the FORM NUMBER of your, exam 2) When is/was gravitational contraction an important energy-generation mechanism for the Sun? begins to evolve toward the red giant phase? E) radiation zone. a. This is because sunspots are slightly cooler than their surrounding regions; typically temperatures in sunspots are about 3000 Kelvin cooler than the average surface temperature of the Suns corona, which is around 60000 K. Sunspots are relatively cool due to their reduced concentrations of magnetic fields, which causes the plasma to become less dense. As this question implies, safety precautions must be taken in the use of home generators and during power failures in general. . two zones that absorb radiation from the Sun. Radio waves from GPS are strengthened in the ionosphere. C. The depletion is restricted to the arctic and antarctic regions. If the Sun suddenly stopped emitting neutrinos, what might we infer (after checking that our neutrino detectors were still operational)? a measurement of the composition (abundances of elements) inside. Magnetic fields A) because there are so rare Sunspots are generally cooler than the surrounding photosphere because they are formed from regions of disrupted plasma flow. Why does the Sun emit neutrinos? Because they are shrouded in very thick atmospheres. 4. B) joules C. It is critically important in regulating the temperature of the planet. A A) thousands of degrees. Two helium nuclei are formed from the four protons. Which of the following statements about solar sunspots is NOT true? Sunspots appear darker than the surrounding area because the magnetic field reduces the temperature at the location of the sunspot. True False 3. . , A new embankment, when completed will occupy a net volume of 257,000cy. C) The chromosphere and corona are both best studied with visible light. old, because the G and K stars are already evolving off (away, c. What are the appropriate units for the Sun's luminosity? How thick would you need to make this shield to ensure that it can stop a neutrino? Sunspots can vary in size from just a few hundred to over 100,000 kilometers across. At solar maximum, the height of magnetic activity, we observe many sunspots and solar flares. Satellites in low-Earth orbits are more likely to crash to Earth when the sunspot cycle is near solar maximum because What is a small mass of tissue that is made up of Purkinje fibers, ganglion cells, and nerve fibers, that is embedded in the musculature of the right atrium, and that originates the impulses stimulating the heartbeat? They can have strong magnetic fields that create solar bursts that can cause solar storms on Earth. They are cooler because their strong magnetic fields suppress convection and prevent hotter material from flowing into them. C Sunspots are concentrations of magnetic field in the photosphere of the Sun which appear as dark spots on the Suns surface. D) The core would heat up, fusion rates would increase, and the core would re-expand. An ice storm breaks a transmission line and interrupts electric power to a town. D 26. Which of the following is not true about sunspots? What is the term for loops or sheets of glowing gas ejected from active regions on the solar surface? We also use observations of vibrations on the Sun to learn about its interior structure in much the same way we use seismic testing on Earth. C) We do not know how to detect electron neutrinos. C. potassiumhas a lower ionizationenergy than sodium D. A) The Sun becomes less efficient and must increase the rate of fusion to produce the same amount of energy. D E) the weak force. No, sunspots do not make the Earth hotter. New resources and matter are being added to Earth's systems all the time. If they were hotter then they would be brighter since, by the blackbody law, Luminosity is proportional to Temperature 4. E. All radio signals pass through this region virtually unaffected. The Sun will exhaust its nuclear fuel in about Circle the correct indirect object pronoun to complete the sentence. The CFC molecules react with ultraviolet light to release chlorine which then destroys ozone. Higher-mass stars run through their lives faster and have shorter, b. The "star" appears to wiggle in its path across our sky against, *d. Where are the most massive stars to be found in the main sequence of, b. A) The Sun generates energy by fusing small nuclei into larger ones, while our power plants generate energy by the fission (splitting) of large nuclei. Sunspots are actively rotating regions that contain strong magnetic fields and are usually found in pairs. The troposphere holds more than ________ percent of the atmospheric mass. B) The Sun's mass is about 30 times the mass of Earth. 15. b. A) the strong force and the weak force Which of the following is not true of sunspots? B a very small asteroidlike body orbiting the Sun. , its "bank" condition, the borrow material has a moist unit weight of 129pcf, a water content of, 16.5% and an in place void ratio of 0.620. The helium atom has, a. This is because large magnetic fields are concentrated in these areas, inhibiting convection and cooling the surface. What is the common cause of sunspots, flares, and prominences? aims to reduce and eliminate all ozone depleting substances. We observe the Sun to exhibit a sunspot cycle over a period of 22 years, tied directly to its magnetic activity. Sunspots are cooler areas on the sun's surface that are relatively darker than the surrounding surface and are caused by intense concentration of magnetic fields. A) strong force The Sun's rate of fusion is gradually increasing over time. The number of sunspots has been historically linked to the 11-year sunspot cycle, where sunspots peak in intensity approximately every 11 years. additional The proton-proton chain is B) The Sun emits light of longer average wavelength. How do we know how old the solar system is quizlet. At the height of this cycle, known as solar maximum, the Sun's magnetic poles flip. All the photons produced in the Sun's core have been absorbed by the outer edge of what region of the Sun? B) Neutrinos are created as a by-product of the proton-proton chain. in nebulae composed of gas and dust. A) The number of sunspots peaks approximately every 11 years. The subsolar point is at the Tropic of Capricorn (23.5 S). D) They are tiny black holes, absorbing all light that hits them. compared c. These flares are outbursts of charged particles that can affect radio communications on Earth. sunspots are surface disturbances caused by magnetic storms. B) nuclear fusion E. Atmospheric pressure is greatest in the mesosphere. Why do sunspots appear dark? D) nuclear fusion. C. The tropopause serves as a buffer against the pressure exerted by the atmosphere. Why do you turn down this excellent offer? Which of the following is true of the Sun's electromagnetic spectrum? young A correlated equilibria to the market game is either a sunspot equilibrium or a non-sunspot equilibrium to the related securities games, but the converse is not true in general. D) The Sun was born with a supply of neutrinos that it gradually emits into space. C) extremely hot plasma flowing along magnetic field lines. D) because they rarely interact with matter The 11 year sunspot cycle on the Sun is, a. Nuclear power plants on Earth create energy in the same way as the Sun. A) The number of sunspots peaks approximately every 11 years. What was the major drawback of this idea? E) The sunspot cycle is the cause of global warming. b. B) The magnetic polarity of the Sun reverses approximately every 11 years. d. A) We have X-ray images from satellites of the interior of the Sun. They occur in regions of lower-than-average magnetic fields. c. D) convection zone Every material is composed of microscopic components known as atoms. D) 600 million tons a. C) The Sun generates energy through nuclear reactions while nuclear power plants generate energy through chemical reactions. composition, origin, evolution. D. The Northern Hemisphere spring officially begins. C computer-based processing tool for analyzing geographic data. Which of the following is the phase of matter in the Sun? A) It was important when the Sun was forming from a shrinking interstellar cloud of gas. Which of the following is true of the September equinox? What is the solution to the solar neutrino problem? It is intrinsically brighter than the Sun. B) at the same temperature but denser than the surface. During this time, the number of spots can vary from a few to hundreds at a time. Galileo's Daughter: A Historical Memoir of Science, Faith, and Love is a book by Dava Sobel published in 1999. the larger the stellar mass, the larger the luminosity. C. potassiumhas a lower ionizationenergy than sodium D. The fundamental nuclear reaction occurring in the core of the Sun is What is the typical length of time between sunspot minimums and sunspot maximum; that is, what is the typical length of the "sunspot cycle"? B The CFC molecules react with ultraviolet light to release carbon which then destroys ozone. Two of the protons are ejected back into the solar material. D) orange A) The core would cool off and continue to shrink as its density increased. B) the gravitational force E) lumps of denser material in the Sun, What are coronal holes? finally b. What is the Sun made of (by mass)? 13. The sunspot cycle, a huge effect, was not discovered until 1843 by Samuel Heinrich Schwabe.The German amateur astronomer was looking for a planet inside the orbit of Mercury and made careful daily drawings to track its passage across the face of the Sun. C) 600 tons The sun emits radiant energy composed of, 11. Which the following is not true of sunspots? gas pressure to halt the collapse. Why must the Sun's rate of fusion gradually rise over billions of years? E. It results from chemical reactions with chlorine derived from CFCs. Daylength is longest on the summer solstice and is shortest on the winter solstice. Which approach gives a more accurate estimate of. Sunspots are cooler areas on the suns surface that are relatively darker than the surrounding surface and are caused by intense concentration of magnetic fields. D) We see many sunspots on the surface of the Sun. As magnetic activity increases, the sunspots form lower down and in greater numbers. Re-insert Show explanation.

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