Key Stage 3 (KS3) Energy Practice Test

A kilojoule (kJ) is a unit of energy commonly used in various scientific and practical contexts. The prefix "kilo" in the metric system denotes a factor of 1,000. Therefore, when converting kilojoules to joules, you multiply by 1,000. This means that 1 kJ is equal to 1,000 joules. Understanding this conversion is important, especially when working with energy values in physics, nutrition, or any field that measures energy consumption and production.

This foundational knowledge is essential for calculating energy requirements, efficiency of processes, or understanding nutritional values, ensuring clarity in communication across various disciplines.