Are not considered a reliable tool for short-term prediction of earthquakes because they precede only about half of earthquakes and many times, are not followed by a large quake.

Foreshocks.

Explanation:

A foreshock is a kind of earthquake that happens before a greater seismic event.  Foreshocks have been used as a means of predicting earthquakes, but this approach has been proven unreliable because only some earthquakes show foreshock events, and several events resemble foreshocks but are not followed by a bigger earthquake, which can lead to false alarms.

how do you know that

explanation:

hi there!

moors is essentially another word for muslims.

the moors invaded spain around year 700, during their time ruling spain the muslims promoted religious tolerance (moors tolerated jews who were viewed as outcasts by northerners), the moors as well had a great impact on their language, and architecture (palaces were created).

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