A cataract is an area of a river where the elevation of the streambed changes too quickly or has to many boulders meaning people couldn't use part of the river as transportation.
This was a good thing because the cataracts effectively served as barriers so they could control travel. This meant that the Pharos found it impossible to control the land south of the first cataract. This ending up becoming the southern border of Ancient Egypt.
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Answer:
when animals breathe or die they give off carbon dioxide, humans when we eat and breathe we are exalting carbon dioxide that goes into the atmosphere.
The order of these periods is the Cretaceous period, Jurassic period, Triassic period, Devonian period, and Cambrian period.
The phrase "Cuddly Old Sheep Dogs Make Perfect Pets; They Just Crowd People Nearby Quietly" is one technique used to organize geological periods. In this phrase, the first letter of each word represents a period.
For example:
- Old starts with "o" and represents the Ordovician period
- Quietly starts with "q" and represents the Quaternary period
- Make starts with "m" and represents the Mississippian period
In this context, the order of the given periods from the most recent to the oldest one is:
- The Cretaceous period "crowd"
- The Jurassic period "just"
- The Triassic period "they"
- The Devonian period "dogs"
- The Cambrian period "cuddly"
Learn more in: brainly.com/question/7277813
The Richter scale is used, from 0.1 to 9.0 magnitude. The Richter scale is determined from the logarithm of the amplitude of waves recorded by seismographs.
The first word is Sink and the second is denser
