Welcome to Exploring the Environment TM (ETE). The ETE online series, which (47)______ an integrated approach to environmental earth science through modules (模块) and activities, is developed at the NASA Classroom of the Future TM, at Wheeling Jesuit University. It is supported by NASA’’s Information Infrastructure (基础设施) Technology and Applications (IITA) Program, which (48)______ public use of Earth and Space Science remote sensing databases over the Internet. The vision of the ETE online series is to promote science-literate and reflective students who are knowledgeable of the earth’’s processes and their responsibilities. The problems in the ETE modules and activities ask students to address human activities and their (49)______ upon the environment. The modules and activities incorporate environmental issues such as water quality, deforestation, biodiversity, volcanoes, ozone depletion, and (50)______ climate change. Featuring problem-based learning (PBL), the ETE series provides students with tools to (51)______ scientific, social, political, and cultural aspects of controversial, authentic environmental problems. Standard problem-solving models, online resources that include relevant satellite imagery, and (52)______ for extended inquiry are available to students. Student-directed research generally lasts a (53)______ of five weeks but often extends throughout the semester. Working cooperatively or (54)______, students (55)______ in problem-based modules and activities that require them to formulate problem statements; to collect and yze data; and then to prepare and present their findings, solutions, or recommendations. These findings, solutions, or recommendations should (56)______ students’’ understanding and awareness of the dynamics of both physical/biological and socio-economic variables. Word Bank A) engage B) solve C) global D) promptly E) investigate F) individually G) act H) impacts I) demonstrate J) serve K) features L) minimum M) recommendations N) primary O)facilitates