Which of the following are units that would be taught in a lecture covering the metric system?

The metric system is a decimal-based system of measurement that is used internationally for various scientific and everyday uses. The units taught in a lecture covering the metric system would include basic measurements of mass, length, and volume that are standardized and commonly used across different fields.

Kilograms, grams, kilometers, and meters are all fundamental units in the metric system. Kilograms and grams measure mass, kilometers and meters measure length, and these units follow a logical progression based on powers of ten, which makes conversions within the metric system straightforward. For example, 1 kilogram is equal to 1000 grams, and 1 kilometer is equal to 1000 meters. This consistency is one of the key features that make the metric system practical for global use.

In contrast, the other options include a variety of units that are either part of the imperial system (such as pounds, inches, gallons, and miles) or a mix of systems that do not primarily focus on metric units. Therefore, the choice highlighting kilograms, grams, kilometers, and meters is the only one that correctly represents units taught in the context of the metric system.