The pH of a solution indicates the concentration of free H+ ions in solution on a negative log base 10 scale. Low pH (acidic) means high H+ concentration High pH (basic) means low H+ concentration.
Mistakes. 1  In the manga, Ravenpaw is shown with a slightly altered appearance from his description in the books. 2  He has been mistakenly called Ravepaw. 3  He was mistakenly mentioned with blue eyes.  He is mistakenly called a rogue by Sandstorm in A Clan in 1  Need. He is mistakenly called 'Ravenclaw' by Vicky.
Look for the Common Raven's heftier bill, shaggy throat feathers, more slender, pointed wings, and longer, wedge-shaped tail. The crow-sized Chihuahaun Raven of the desert Southwest has a shorter bill, longer feathers around the bill, and less deep voice. Where these two species overlap, the Chihuahuan Raven tends to be in desert at lower elevations and the Common Raven in forests at higher elevations. And here's a useful behavior clue: ravens cruise along roads looking for roadkill.