Answer:
They found evidence of an impact crater in Mexico
Explanation:
The K-Pg boundary is the boundary that separates two periods, but also two eras. The two periods that are separated by this boundary are the Cretaceous and the Tertiary, while the two eras are the Mesozoic and the Cenozoic. The boundary is marked by a mass extinction, and the scientists started to hypothesize as to why it happened. There were numerous different theories, but a clue in Mexico, or rather right next to the Yucatan Peninsula, shed new light on it. The scientists found an impact crater, formed either by a large asteroid or a comet. Such an impact would have easily caused sudden and drastic changes on the Earth, killing of the majority of the species. This impact released such a big amount of energy that it killed everything in the surrounding area in seconds. On top of that, it caused an extremely hot wave of air across the whole planet, killing many more organisms. It managed to trigger most of the volcanoes to erupt, as well as the earthquakes, causing also very large tsunamis. The sunlight got blocked for quite some time from all the aerosols in the atmosphere as well. This resulted in a mass extinction of the dominant species, like the dinosaurs, but it opened up the terrain for the evolution of the others, like the mammals.
Answer:
<u>Climate change as catastrophic, irreversible this article is taken from Guardian news</u>paper.
Explanation:
- As global warming is a long rise in the average temperatures of the earth climate it's a major aspect o climate change taking place all over the world. And it is measured by the rise in rising in surface temperature both on land and in oceans and measured continuously as its growth is continuous.
- According to the IPCC panel the the global rise in temperature form 2.8 degree to 4.8 degrees in 21st century and the possible costs associated to this event site migration of species from these place, along with the environmental impact of mass extinction or relocation natural ecosystems such as coral reefs, mountain chains and shrinking of arctic and antarctic poles.
- Various NGOs have come up that try to mitigate this change in the evolution of natural gases, either by climatic engineering or by adaptation of habitats. NASA, UNFCCC and G77 nations have taken this step towards the prevention of climatic change.
Answer:
Condensation near the ground
Fog develops when air having a relatively high humidity comes in contact with a colder surface, often the Earth's surface, and cools to the dew point. Additional cooling leads to condensation and the growth of low-level clouds.
Water because they might have a competition over it
<span>What you describe is called devolution. This is when power is transferred to lower levels. When devolution occurs, autonomous regions occur and things like federations are created because numerous autonomous regions work together under federative rule, but still retain a great degree of independence.</span>
