Environmental Science 2026/2027 | 100+ Questions & Answers | Ecology, Ecosystems, Energy Flow, Sustainability & Scientific Method

The Environmental Science 2026/2027 study document is a 16-page exam review containing 100+ questions, answers, definitions, examples, and key environmental science concepts. It provides focused coverage of ecology, ecosystems, biotic and abiotic factors, populations and communities, food chains and food webs, trophic levels, energy pyramids, natural resources, sustainability, climate change, water chemistry, photosynthesis, cellular respiration, macromolecules, population growth, and the scientific method. The material is organized in a concise question-and-answer format designed for rapid revision and concept reinforcement. A major section introduces the foundations of ecology and ecosystem organization. Students review organisms, populations, communities, ecosystems, the biosphere, habitats, and interactions between living organisms and their physical environment. The document distinguishes biotic components from abiotic factors such as water, sunlight, soil, and temperature and explains the roles of producers/autotrophs, consumers/heterotrophs, herbivores, carnivores, omnivores, scavengers, decomposers, predators, and prey within ecological systems. The study material provides detailed review of energy flow through ecosystems, including food chains, food webs, energy pyramids, trophic levels, and the 10% rule. It explains that food chains and webs begin with producers that capture solar energy and that energy availability decreases at higher trophic levels. Students also review the distinction between food chains and food webs and why interconnected food webs provide a broader representation of feeding relationships within ecosystems. Another important section covers natural resources, sustainability, and human environmental impact. Topics include renewable and nonrenewable resources, fossil fuels, natural capital, ecological footprints, sustainable development, the tragedy of the commons, climate change, genetically modified foods, exponential population growth, and the environmental consequences associated with both affluence and poverty. The document also uses the Borneo Cat Drop/DDT example to illustrate how attempts to solve one environmental problem can produce unexpected ecological consequences, reinforcing the interconnected nature of environmental systems. The document additionally integrates foundational chemistry and biology concepts relevant to environmental science. Students review the hydrologic cycle, hydrogen bonding, water polarity, cohesion, adhesion, capillary action, surface tension, specific heat, water as a solvent, acids and bases, solutions, solutes, and solvents. Biological concepts include photosynthesis and its reactants and products, cellular respiration, ATP, enzymes, and the relationship between photosynthesis, cellular respiration, and atmospheric carbon dioxide. Macromolecule review covers carbohydrates, proteins, lipids, nucleic acids, amino acids, nucleotides, and their major biological functions. The final section strengthens understanding of environmental scientific inquiry and experimental design. It defines environmental science and its goals while reviewing quantitative versus qualitative data, hypotheses, independent and dependent variables, control groups, experimental constants, inference, scientific theories, scientific laws, and the major steps of the scientific method. This combination of environmental, ecological, biological, and experimental concepts makes the resource useful for both unit examinations and cumulative environmental science review. Relevant students: This document is particularly relevant for Environmental Science students, introductory ecology students, high school environmental science students, AP Environmental Science learners reviewing foundational concepts, college introductory environmental science students, biology students, ecology students, sustainability students, and learners preparing for exams covering ecosystems, energy flow, natural resources, climate change, water properties, and scientific investigation. The uploaded document does not identify a specific university or course code, so none has been added to avoid inaccurately attributing the material. 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