The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs’ food supply. However, in the 1980s, father-and-son scientists Luis (1911-88) and Walter Alvarez (1940-) discovered in the geological record a distinct layer of iridium–an element found in abundance only in space–that corresponds to the precise time the dinosaurs died. This suggests that a comet, asteroid or meteor impact event may have caused the extinction of the dinosaurs. In the 1990s, scientists located the massive Chicxulub Crater at the tip of Mexico’s Yucatán Peninsula, which dates to the period in question.
Dinosaurs roamed the earth for 160 million years until their sudden demise some 65.5 million years ago, in an event now known as the Cretaceous-Tertiary, or K-T, extinction event. (“K” is the abbreviation for Cretaceous, which is associated with the German word “Kreidezeit.”) Besides dinosaurs, many other species of mammals, amphibians and plants died out at the same time. Over the years, paleontologists have proposed several theories for this extensive die-off. One early theory was that small mammals ate dinosaur eggs, thereby reducing the dinosaur population until it became unsustainable. Another theory was that dinosaurs’ bodies became too big to be operated by their small brains. Some scientists believed a great plague decimated the dinosaur population and then spread to the animals that feasted on their carcasses. Starvation was another possibility: Large dinosaurs required vast amounts of food and could have stripped bare all the vegetation in their habitat. But many of these theories are easily dismissed. If dinosaurs’ brains were too small to be adaptive, they would not have flourished for 160 million years. Also, plants do not have brains nor do they suffer from the same diseases as animals, so their simultaneous extinction makes these theories less plausible.
Answer: August 15, 1947
Independence Day in India occurs on August 15 of every year. It celebrates the date in 1947 when the Indian Independence Act came into effect, which established India and Pakistan as separate countries, no longer under British imperialist rule.
Explanation:
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NOTES: Global mean surface temperature from 1880 to 2018, relative to the 1951–1980 mean. The black line is the global annual mean, and the red line is the five-year local regression line.
The report of the Intergovernmental Panel on Climate Change of October 2018 showed that the difference in impact between 1.5°C and 2°C was very large. That 0.5°C increase would imply that, for example, the length of droughts would double, the occurrence of extreme weather events would more than double, and all the coral would be gone. That is why the UNFCCC Paris Agreement (COP21) of December 2015 – to which more than 190 countries have subscribed – wisely set the target of holding temperature increases to “well below 2°C” with efforts to hold to 1.5°C.
To have a reasonable chance of holding below 2°C, we have to cut emissions by around 40% absolutely in the next two decades. Much bigger cuts are necessary for 1.5°C.
<em>BONUS: </em><em>Global warming is the process of raising the average temperature of the earth's atmosphere, oceans, and land. The global average temperature on the earth’s surface has risen 0.74 ± 0.18 ° C over the last hundred years. The Intergovernmental Panel on Climate Change (IPCC) concluded that "much of the increase in global average temperature since the mid-20th century is most likely caused by increasing concentrations of greenhouse gases due to human activity" [1] through the greenhouse effect. These basic conclusions have been expressed by at least 30 scientific and academic bodies, including all national academies of science from the G8 countries.. The climate model used as a reference by the IPCC project shows that global surface temperatures will rise by 1.1 to 6.4 ° C between 1990 and 2100. </em>
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<em>I hope this helps!! </em>
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The correct answer that would best complete the given statement above would be the word AUTOMATISM. <span>Robert Motherwell was influenced by the surrealist concept of automatism, </span><span>which incorporates intuition, spontaneity, and the accidental when creating artwork. Hope this answer helps. </span>
