Which unit is equivalent to 1 kilojoule?

One kilojoule is defined as 1,000 joules. The prefix 'kilo-' in the metric system signifies a factor of 1,000. Therefore, when converting kilojoules to joules, you simply multiply the number of kilojoules by 1,000. This means that 1 kilojoule equals 1,000 joules, which aligns perfectly with the scientific definition of energy measurement.

Understanding the metric prefixes is crucial in conversions within the SI (International System of Units), and recalling them can facilitate various calculations in physics and other sciences. Recognizing that other options present differing values (100 joules, 10 joules, and 1,000,000 joules) highlights the importance of understanding base units and prefixes to avoid miscalculations in energy conversion.