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.
Resource mobilization theory is a theory where resources are needed for a social movement to bring about change, regardless of the group's level of deprivation.
<h3>What is the resource mobilization theory?</h3>
The resource mobilization theory is a well-known model employed to understand social movements and their schools of thinking.
- This theory (resource mobilization theory) states that the success of social movements largely depends on the availability of limited resources.
In conclusion, resource mobilization theory is a theory where resources are needed for a social movement to bring about change, regardless of the group's level of deprivation.
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Answer:
implementing a plan of explanation
The correct answer is person's performance
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Hypotheses</u>,<u> dependent</u> and <u>independent variables</u> form a set of tools that help us to create theories about natural phenomena.
The process for investigating a particular phenomenon in nature usually involves three levels. In the first level, observation of facts, phenomena, behaviors and activities takes place; at the second level, we have the hypotheses and finally, at the third level, theories, valid and sustainable hypotheses (those that have been tested) arise.
Dependent Variable are values (phenomena or facts) to be discovered or explained, by virtue of being influenced, determined or affected by the independent variable.
Answer:
INTOLERANCE TOWARDS RACISM.
BECAUSE IT MEANS YOU CAN'T ACCEPT THE DIFFERENCES OF ONE'S LIFE OR RACIAL BACKGROUND.
