Answer:
The early kings ruled over only their own city-states. Lacking a centralized government and leader, the ancient region was prone to internal fighting among the kings for land and resources. As early as the 4th millennium BCE, ancient Mesopotamia covered the region that is now known as Iraq.
Explanation:
The Cenozoic era is the most recent era and includes the emergence of mankind and its' ancestors. It includes earth history from 66 million years to almost the present and also is known as the age of mammals which includes mankind. Evolution of the mammals can be traced relatively easily since there are most likely more abundant fossils than back in say the Cambrian or especially the Precambrian.
Seasons happen because Earth spins around an axis which is tilted at an angle of 23.5 degrees. Because of this spinning, parts of Earth gets nearer or more distant from the Sun. Around the June Solstice, the Northern Hemisphere is turned towards the Sun, and gets more direct Sun rays. Because of this, the Northern Hemisphere experience summer in June, July and August. Opposite from this, for the people of South Hemisphere, June, July and August represent the months of winter. Around the December Solstice, the situation completely changes: Southern Hemisphere is turned towards the Sun, and Northern is more distant.
Answer:
The Earth also gives us clues about the levels of greenhouse gases that existed in the past. For example, ancient air bubbles trapped deep in the ice of Greenland and Antarctica reveal how much carbon dioxide was present long ago.
Explanation:I learn it in 8 grade.
