The differences between a group and a - is whether the members identify with one another and whether interaction is temporary or permanent. a primary group consists of people such as -, whereas a secondary group might consist of people such as -.
1. crowd
2. family members
3. students taking this course

All of the following are examples of sedimentary rocks except? a) sandstone made of small pieces of sand cemented together b) coquina made of small shells cemented together c) shale made of small silt particles cemented together d) quartzite, or sandstone that has been subject to high pressure and heat over time