Texture is a very important characteristic in identifying igneous rocks. Answer the following questions to help you become more familiar with igneous rock textures

7) What term is used to describe a fine grained texture that formed from rapid cooling?

8) Would a rock that exhibits this fine grained texture be extrusive or intrusive?

9) What term is used to describe a course grained texture that formed from slow cooling?

10) Would a rock that exhibits this course grained texture be extrusive or intrusive?

11) What term is used to describe a rock that has both a fine and course grained texture?

12) How is a rock that contains both fine and course grained textures formed?