You cannot achieve full marks for an exam question if you do not understand what the question is asking you to do. These terms are often used in environmental science and other exams:

• name/nominate: simply state. For example, name a pollutant – carbon monoxide
• define: requires a description that identifies and differentiates the term or concept
• describe: requires giving some properties of the subject. For example, describe the pollutant – a pink liquid, volatile, lower density than water, toxic to humans
• outline: briefly give an overview of the main features or issues. For example, outline a management plan – list measures to safeguard the environment, set up equipment to monitor emissions, establish acceptable limits, determine whether limits are met, and if necessary modify the procedure
• evaluate: requires a judgment based on evidence or data
• compare: list similarities and differences.