what is the metric units used for

1. distance
2. length
3. volume
4. weight or mass?

The metric system is a decimal-based system of measurement commonly used worldwide. Here are the metric units for the following measurements:

1. Distance: The metric unit used for distance is the meter (m).
To convert between different units of distance, you can use the following conversions:
- 1 kilometer (km) = 1,000 meters
- 1 meter = 100 centimeters (cm)
- 1 meter = 1,000 millimeters (mm)

2. Length: The metric unit used for length is also the meter (m). The meter is the base unit for measuring length in the metric system.

3. Volume: The metric unit used for volume is the cubic meter (m³). However, for smaller volumes, other units such as the liter (L) are commonly used.
To convert between different units of volume, consider the following conversions:
- 1 cubic meter (m³) = 1,000 liters (L)
- 1 liter (L) = 1,000 milliliters (mL)

4. Weight or Mass: The metric unit used for weight or mass is the kilogram (kg).
To convert between different units of weight or mass, you can use the following conversions:
- 1 kilogram (kg) = 1,000 grams (g)
- 1 gram (g) = 1,000 milligrams (mg)

Remember that these are just the basic units for each measurement. In some cases, prefixes like kilo (k), centi (c), and milli (m) are added to modify the base unit for larger or smaller quantities.