Scientists in Japan have begun setting off explosives along a geological fault line analyzing the Earth's structure and trying to map the danger spots.
Explanation:
Japan lies in the world’s highest active earthquake belt along the Pacific Ring of Fire and is highly prone to earthquakes. Understanding and analyzing the activities of the geological fault lines helps to identify the danger spots of earthquakes and mark the hazard zones. This helps to prevent the damage of earthquakes by providing pre-warnings and precautions.
There are numerous fault lines across Japan and scientists are trying to identify the danger spots by triggering explosions along the fault line in the south-west of Tokyo. This fault line separates Japan mainland from the Pacific Ocean and the Sea of Japan.
The explosions help to analyze the movement of the tectonic plates underneath the Pacific Ocean and the Sea of Japan. This helps to track tsunamis arising from oceans during high-intensity earthquakes.
Answer:
A) Teddy Roosevelt
Explanation:
I think but I know its Theodore Roosevelt whatever his nickname is I think teddy
Answer:
1- Option (D)
2- FALSE
Explanation:
The seafloor spreading takes place because of the divergent plate motion. Alfred Wegener observed this motion of the seafloor and the continents but was not able to explain the main mechanism behind this until the new theory came into the picture. The divergent motion of seafloor and the motion of the continents were explained by the universally accepted theory known as the Plate tectonic theory. This theory was able to explain the mechanism behind this plate motion.
The study of the seafloor spreading provided some pieces of evidence that supported the continental drift theory. They gave a basic idea about how the oceanic plate gets subducted (consumed) at the convergent plate motion that undergoes partial melting at greater depth. As a result of which the magma rises up to the surface on the overriding plates.
The crust represents the outermost layer of the earth. They are of 2 types, namely the oceanic and the continental crust. These crusts when slide past one another in a transform plate boundary, it is neither created nor destroyed. It remains conserved.
Thus, the correct answers are given above and the second statement is false.
Answer:
Two possible reasons for the massive extinction at the end of the Paleozoic Era are an asteroid collision and massive volcanic eruptions.
Explanation:
The massive extinction that occurred at the end of the Paleozoic Era is the biggest extinction from what is known so far. The majority of the species died out, and whole families of animals and plants were wiped out of the face of the Earth. It was only small and highly adaptable organisms that managed to survive and give rise to the later life-forms.
The two possible reasons for this massive extinction are an asteroid impact and massive volcanic eruptions. An asteroid collision would have created drastic changes in a matter of minutes and hours, with effects lasting for a long period of time, thus eliminating the majority of the life. Massive volcanic eruptions, with the Siberian super-volcano being the prime candidate, may have caused enormous amounts of carbon dioxide and sulfur dioxide to end up in the atmosphere, thus rapidly changing the living conditions on the planet.
