Final answer:
The SI base units are the meter for length, the kilogram for mass, the second for time, and the kelvin for temperature, used widely for scientific consistency.
Step-by-step explanation:
The SI base units include the meter for length, the kilogram for mass, the second for time, and the kelvin for temperature.
These base units are part of the International System of Units (SI), which is a metric system. The metric system is characterized by its use of powers of 10 to relate different scales of measurement, making it easier to convert between different units of measurement. For nearly all scientific applications, these SI base units are used because they help maintain consistency and standardization across various fields of science and engineering.