阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
A field trip is a journey by a group of people to a place away from 【小题1】（they）normal environment.
The purpose of the trip is usually observation for 【小题2】(educate), non-experimental research or to provide students with experiences outside their everyday 【小题3】(activity), such as going 【小题4】(camp) with their teachers and classmates. The aim of this research is to observe the subject in its natural state and 【小题5】(possible) collect samples(标本). In western culture people first come across this method during school years 【小题6】classes are taken on school trips to visit a geographical feature of the landscape. Much of the early research into the natural sciences 【小题7】(be) of this form. Charles Darwin is considered to be 【小题8】important example of someone who has contributed 【小题9】science through the use of field trips.
【小题10】(reduce) risks and expenses, most school systems now have set up field trip procedures that consider the entire trip from estimation, approval to scheduling.