The fact that volcanic rock has often been found early in the rock record but less frequently in later rock layers suggest to scientists the following conclusion about early earth: <span>volcanic activity was more common in the past than it is today.
</span>Besides volcanic activity in general, also huge volcanic eruptions<span> were much </span>more common than today<span>.</span>
Spatial perspective is to study something in terms of location, distance and direction. Meanwhile, ecological perspective is to study something in terms of environment and social interaction. Good luck!
Turkey. It is the largest area with the same ethnic people in it. Different ethnic people come from different countries- so- you wouldn't want to pick a small country or a country surrounded by many smaller countries.
I hope this helps!
~cupcake
Northern Ireland is separate from Ireland because 90 years ago people living in Ireland had a war against the British rulers. That's how Northern Ireland split from Ireland.
Hope this Helps!
The answer is, b. other substances
