Haza (هذا) = This + is : for male nouns
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* هَذَا كِتَابُ اللُّغَةِ العَرَبِيَّة.
haza ketabo lloghatil arabiah.
This is the Arabic language book
.
.Hazehi (هذه) = this + is : for female nouns
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* هَذِهِ بِطَاقَةُ العِيد.
hazehi betaqatoul eid.
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Now I hear your loud question...How to differentiate between male and female nouns?!
There isn't a golden rule except for the urge for extra learning and memorizing every noun with its gender type.
In some cases the "taa marboutah ة " at the end of the noun indicates fiminization......but don't count on that, because it is not a fixed rule...