Answer:
Because there weren't enough big brains out there to cover all of the major things and that there we're major time periods of things.
Explanation:
Answer:
It is the movement of heated water, usually beneth the surface of the Earth
Explanation:
Timelines show historical events or periods because they can happen years or decades ago and that means historical.The purpose of a historical map is to describe or show important travels, rides, or routes that famous people in history took.Who is the author?
Can you find the authority or credentials of the publisher?
What if there is no author for an internet source?
This should be under mathematics not geography.
