Students are introduced to the concept of an environment and the interactions within it through written and hands-on webbing activities. They also learn about environmental engineering careers and the roles of these engineers in our society.

Environmental engineers design and build a range of projects and systems in our natural and human-made surroundings. For example, projects that re-direct a river's natural flow or restore contaminated rivers are types of environmental challenges that engineers take on. They also solve environmental problems that involve air pollution, public health, waste disposal, toxic materials control or land protection, among many others. environment engineer interaction natural abiotic biotic After this lesson, students should be able to: Describe an environment. Identify interactions taking place in an environment. Appreciate the degree to which living and non-living things depend on one another. Classify parts of the environment as either biotic or abiotic. Identify and understand the roles of environmental engineers in our society. Are you concerned about the natural and human-made environment? Are you interested in solving problems related to water or air pollution, solid waste disposal, recycling, preserving the rainforests, new types of energy, how we use our natural resources, etc.? If you have answered yes to any of these questions, you would likely be interested in learning more about becoming an environmental engineer when you grow up. There are two types of environments that exist: 1) the natural environment (see Figure 1), and 2) the human-made environment (see Figure 2). Can you think of things in your environment that are natural? (Have students brainstorm answers, such as water, air, sun, soil, food, animals, etc.) The natural environment is split into two parts: living things, which we call biotic, such as plants and animals; and non-living things, which we call abiotic, such as water, air and sunlight. Can you think of things in your environment that are human-made? (Have students brainstorm ideas, such as houses, cars, clothing, etc.) Could you live without the environment? (Answer: You can live without some parts of it, but you cannot live without the LAWS: light, air, water and soil.) Are there some parts of your environment that you could live without? (Answer: Yes, you can live without your computer, rollerblades, bike, electronic games, mountains, etc. You cannot live without light, air, water and soil.) The environment affects your health and well-being, in addition to your choices for entertainment, occupation, clothing, etc. Environmental engineers design and create a vast majority of things we use in the environment in everyday life. They also control and fix parts of our environments that are natural and human-made, such as the direction of a river or the contamination of a river. They work with everything from air pollution, hazardous and toxic materials and water supplies to waste disposal, public health, land and other natural resources. Environmental engineering came about in the 1800s, post Civil War due to life-threatening water quality and air quality problems. In 1830, environmental engineers designed the first water supply systems in the United States. Furthermore, by 1939, the start of World War II, environmental engineers ensured that water was safe to drink. Environmental engineering continues to be a recognized profession today because of the continuing need for pollution control, among other environmental issues. Environmental engineers assess and manage the effects of human and other activity on the natural and human-built environment. They work in many different major categories of environmental protection: Environmental engineers have diverse roles within these major categories. They frequently work closely with other professionals, at times pooling expertise on particular projects. They can be: Additionally, there are several different types of companies or organizations who employ environmental engineers: A natural environment consists of two parts: abiotic (the physical environment) and biotic (the living environment), as well as the interactions between and within them. Abiotic (physical) environment - includes the natural environment of light, air, water and soil (the environmental LAWS), as well as the human-made environment (houses, stereos, tennis shoes, gum wrappers, etc.). An abiotic environment changes naturally from weathering, erosion, and so forth, but often so slowly that we often do not even notice its change. The effects of human activities (such as clearing a mountain to make a ski area) alter it much more immediately and obviously than natural activities. The natural physical environment is also made up of three parts: the lithosphere (the rocky part), the hydrosphere (the watery part), and the atmosphere (the gassy part). Environments contain abiotic (non-living) factors, but the extent of their presence varies. These non-living factors are known as the environmental LAWS and are represented by: L - Light; A - Air; W - Water; and S - Soil. Biotic (living) environment - includes plants and animals (consumers, producers and decomposers). About 2 million species of plants and animals have been discovered and described, but it is estimated that there may be as many as 30 million species on Earth. Producers are mainly green plants, and they fix the sun's energy and make food from simple substances. Consumers use the food stored by the producers. Decomposers are mainly bacteria and fungi and break down complex compounds into raw materials to be used again by the producers. A human-made environment is any non-natural environment. Humans first began to severely alter the natural environment when they began farming approximately 10,000 years ago. Since then, humans have modified the natural environment in many ways through agriculture, architecture, industry, transportation, etc. As a result of an ever growing human population, the human-made environment is blamed for the major environmental problems (including air and water pollution, among others) facing us today. A great website for students and teachers to find out about many different engineering disciplines is: http://www.discoverengineering.org/ Some biographies of people who work in environmental professions can be found at the following website: http://www.thirteen.org/edonline/wue/cool_careers.html. The physical surroundings of an organism, including all the conditions and circumstances that affect its development (everything that surrounds you is your environment). The parts of the environment that are non-living (a mountain, water, volcano, air, cars, etc.). The parts of the environment that are living or were once living (dinosaurs, trees, grasshoppers, corn, etc.). A person who solves problems related to protecting the environment. A relationship between parts of the environment. Light, air, water, soil Environmental Interactions Moebius Strips Review key vocabulary, especially abiotic factors and biotic factors, and reiterate the roles that environmental engineers play in society. (Reminder: Environmental engineers assess and manage the effects of human and other activity on the natural and human-made environment. Their roles include: researchers, designers, planners, pollution control facility operators, program managers, professional society workers, professors, government regulatory agency officials.) Idea Web: Ask students to brainstorm a list of answers to a question. This may be done as a class, in small groups, or even as a possible homework assignment the day before starting the unit. As a class, use their answers to create an idea web (on the board, an overhead, etc.). An idea web is a network of logically interconnected ideas. For example, the idea "rain" might be connected with a body of water, "lake." Ask the class to decide if anything needs to be added to the web. Be sure they have included living and non-living items (especially LAWS: light, air, water and soil). Ask them: What is an environment? (Answer: Your environment is everything that surrounds you, both natural and human-made items.) What things make up an environment? (Answer: Your environment is everything that surrounds you, both natural and human-made items.) Question/Answer: As a class, discuss some of the following questions: How important do you think the environment is to your life? (Answer: Very important; the environment affects your health and well-being, as well as choices for entertainment, occupation, clothing, etc.) Could you live without the environment? (Answer: You can live without some parts of the environment, but you cannot live without the LAWS — light, air, water and soil.) Are there some parts of your environment that you could live without? (Answer: Yes, you can live without your computer, rollerblades, bike, electronic games, mountains, etc. You cannot live without light, air, water and soil.) What do you think an environmental engineer does? (Answer: See ideas in the Background section. Let students know that they will be learning much more about this in this unit.) Are you concerned about the natural and human-made environment? Are you interested in solving problems related to water or air pollution, solid waste disposal, recycling, preserving the rainforests, new types of energy, how we use our natural resources, etc.? (Note: Let students know that if they answered yes to any of these questions, they may be interested in becoming an environmental engineer.) Bingo: Provide each student with a sheet of paper containing a list of the lesson vocabulary terms. Have each student walk around the room and find a student who can define one vocabulary term. Students must find a different student for each word. When a student has all terms completed s/he shouts "Bingo!" Continue until two or three (or most) students have bingo. Ask the students who shouted "Bingo!" to give definitions of the vocabulary terms. Figure Drawing: Ask students to draw a picture of an environment that they spend time in outside of school; for example, their bedroom, a park, ballet class, etc. On the second day, have students present their pictures and ideas with the class. Collect and review the students' homework. They should follow the steps below: Name the environment they draw and be able to describe why it is an environment. List the biotic and abiotic factors in the environment. Describe at least five interactions that take place in the environment, with at least two of them being multi-step interactions. Describe at least one cycle that occurs in this environment (like clean laundry is removed from the closet and worn, it is then placed in the laundry hamper, laundry in the hamper gets washed, and clean laundry gets hung back up in closet). Describe what type of environmental engineer might interact with their drawn environment. (This allows for a little imagination and humor, especially if they are describing their bedroom or other home environment. For example, a student that has a very messy room may need a hazardous waste engineer! You may need to review some of the types of environmental engineers with them.) Current Events - Ask students to bring in articles from newspapers, magazines, etc. that discuss the environment and environmental engineers. Discuss the environmental engineer's role. Following are some websites for obtaining current environmental articles: http://www.enn.com/ http://www.firstscience.com/site/home.asp http://www.cnn.com http://library.thinkquest.org/26026/Current_Events/current_events_articles.html http://www.pollutiononline.com/content/news/search/adv_search.asp Pick an environmental novel or picture books to read (as a class or as a read-aloud). (Note: You may refer to the References section for some book ideas.) Ask students to review any environmental engineering jobs in the career section of the local paper's Help-Wanted ads. Ask them to develop a general profile of an environmental engineer, including schooling, skills, other necessary experience, salary, etc. Have students research different university web sites for descriptions and requirements for environmental engineering programs and degrees. They should develop a general profile of an environmental engineering education and career. Ask different groups of students to research and write letters to different types of environmental engineers (water, solid waste, consultants, land management, etc.). Students should ask each engineer to define "environment" in his/her own words. The class can compare the results once the students' response letters have returned. Invite an environmental engineer as a guest speaker. A student my have a relative or friend that will be willing to speak to the class. Or, call the US Environmental Protection Agency (EPA), the National Renewable Energy Laboratory (NREL), the local water treatment plant (drinking or waste), a recycling company, or a consulting firm, etc. and ask if they have someone who could come and speak to the class. Ask the guest speaker to define "environment" in his/her own words and compare with the class's definition. Ask the speaker to describe the different types of interactions/relationships s/he deals with in the environment. Ask the speaker to describe his/her career in detail. Display different pictures of different types of environments and ask the students to describe the interactions that take place there. Have them discuss the types of environmental engineer that may come in contact with the environment. Chandler, Pauline. Environmental Issues (Hand-On Minds-On Science Series): Intermediate, Westminster, California: Teacher Created Materials, Inc., 1994. Durell, Ann, Craighead George, Jean and Paterson, Katherine (eds). The Big Book For Our Planet (First Edition), New York: Dutton Children's Books, 1993. Kerrod, Robin. Let's Investigate Science - The Environment, New York: Marshall Cavendish Corporation, 1994. McFadden (ed). Science Plus - Technology and Society (Level Red), Austin, TX: Holt, Rinehart and Winston, 1993. http://www.discoverengineering.org/ http://www.thirteen.org/edonline/wue/cool_careers.html http://www.mines.edu/academic/envsci/ufield.html