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Power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines. A major topic in IELTS Environment and Technology sections.

The space between two objects or points, or the period of time between two events.

To develop gradually, especially from a simple to a more complex form. In IELTS, this applies to biology, technology, and social systems.

The ability of an organism, organization, or system to survive, grow, or sustain itself independently without external help.

To combine or integrate different fields, ideas, or techniques to create a synergy. Originally it refers to grafting in gardening.

The act of putting things in a specific order or position; the resulting state of such an arrangement.

A rate or number as a fraction of 100, commonly known as a percentage. It is essential for describing statistical data and proportions.

The act of spreading out or emitting something from a center. In psychology or logic, it refers to thinking in different directions to find various solutions.

Describing a process or change that cannot be reversed or returned to its original state. Often used in climate change or chemical discussions.

To recreate or reproduce a past event, experiment, or work of art exactly as it was. It often refers to the repeatability of scientific results.