Answer:
Ordovician extinction
.
Explanation:
The Ordovician extinction was an event that occurred around 450 million years ago and caused the <u>disappearance of 60% of marine species.</u>
This event was caused by global cooling which resulted in the <u>drop of the sea level</u>. This change mostly affected the species that developed life in the deep, depriving them of their natural habitat.
Extraterrestrial bodies, specifically the stars
Answer:
geomagnetic field.
Explanation:
The earth magnetic field can be likened to a bar magnet with a North and South pole. It originates from the movement of molten iron and nickel in the outer core.
At every point in time, the magnetic field orientation can change. We must note that the magnetic north lies close to that of geographic north axis of the earth.
Around the mid-oceanic ridges, new materials are brought to the surface. These new materials can contain magnetic minerals such as haematite which are capable of being magnetized as a result of the prevalent magnetic field of the earth. As different materials are brought up, the magnetic minerals preserves the details of the magnetic field at that point in time. Using this information can know the orientation of the magnetic field at any point in time if the magnetic history chart of the earth is constructed. Oceanic ridges becomes older as they move away from the divergent margins.
Answer:
i think the answer is 90%
Explanation:
Answer:
Correct answer is STALIN.
Explanation:
Stalin is the correct answer as he was responsible for the transportation of millions of people. It is estimated that during 1920s and 1930s more than 100 thousand Koreans were moved towards the East. On the other side, during Stalin's reign around 50 thousand Soviet Greeks were transferred.
Gorbachev and Khrushchev were not to blame for this process, while Eisenhower was American, not Soviet leader.
