___________ have higher percentages of oxides of denser elements and silica content varies between 40 to 60 percent.

___________ are smooth,crystalline and fine grained.

___________ are subjected to mechanical weathering  .

____________ are deep seated intrusion of igneous rocks.

__________ rocks are less affected by chemical weathering. 

___________ are usually dome shaped with no definite floor.

___________ are formed from materials derived from other rocks.

__________ are generally lack in iron and magnesium.

____________ are aggregates of mineral elements.

__________ are also known as volcanic rocks.