Answer:1838 - Costa Rica becomes fully independent. 1849-59 - Under the leadership of Juan Rafael Mora, Costa Rica takes the lead in organising Central American resistance against William Walker, the US adventurer who took over Nicaragua in 1855.
Explanation: This should help
Asthenosphere best describes the hot, weak, inner part of the upper mantle, which can flow. Correct answer:A
The asthenosphere is part of Earth's mantle that is located below the lithosphere.It is a layer of solid rock that has so much pressure and heat the rocks can flow like a liquid.
Answer:
The correct order is: 6, 2, 5, 3, 1, 4
Explanation:
Siberian traps refers to the moment when the volcanoes of Siberia expelled a large amount of CO2 and HCl gases that are highly toxic and that promoted a mass extinction, that is, it caused the death of several living beings in a short period of time. This happened over 250 years ago and was caused by the steps:
It all started when volcanoes expelled large amounts of carbon dioxide into the atmosphere, which contaminated the atmosphere and caused a rise in temperature, creating strong global warming. This caused a great warming of the surface of the seas, which caused them to evaporate in great intensity and lose large amounts of oxygen and become anaerobic environments, conducive to the growth of bacteria producing hydrogen sulfide, which is a very toxic gas. This gas was released into the atmosphere, killing several living beings intoxicated with the contaminated air.
