a.Give the definition of "Group" in your own words.

A group is that three or more people work together to achieve a common goal.

b.Discribe the detailed characterictics of the groups.

1.Interdependence：members depend on each other

2.Common goal:the same objective that gather the group

3.Group personality:the group has a collective identity,which inflence the individual

4.Commitment: the desire of group members to work together to complete their task to the satisfaction of the entire group

5.Cohesiveness:the attraction that group members feel for each other and their willingness to stick together

6.Group conflict:disagreement within a group

7.Social facilitation: the tendency for people to do better on simple tasks when in the presence of other people

8.Gender differences:men behave differently with women

9.Group size:three to twenty five people are called small group;larger than twenty-five are called large groups.

10.Norms:a standard or model or pattern 

C.How to make the group members get into a positive participation during the group communication?

1.Make sure that your statement are accurate and objective. This requires having a good understanding of the topic and doing prior research.

2.Members’ comments should pertain to the topic and goals of the discussion at hand.

3.define your terms and provide examples to ensure a common ground.