_________ of coniferous trees help to keep the soil from being washed away .

Dead trees in rainforests do not fall to the group because of the dense _______

Plants in rainforests grow _______.

Animals are not hunted for their _______ .

______ the are within the Arctic circle.

_____ the area within the Antarctic circle.

______ people of the Arctic.

_______ special boat made of animal skin , used by the people of the Arctic.

_____ a special condition caused by extreme cold affecting the hands and feet.

______ was the first Greek explorer to reach the Arctic .

Antarctica is the region around the ______.

Antarctica is a ______ continent.

Today _____ is still uninhabited.

There are no penguin in the _______.

Hazrat _______ (R A) was the first caliph.

The Umayyad dynasty began in ______.

The first four caliphs are knows as the _____ .

The muslims ruled Spain for ______.

The work of compiling the Holy Quran was begun by _________.

The forth caliph was Hazrat Ali ( R A ).

In 634 - 44Islam spread further into Syria and into Iraq .

The capital of the caliphate was moved from Madina to ______.

Abbasids came to power in ______.

Advent of Islam and the passing away of the Holy Prophet in 632 C E.