Question

part 1: fill in the si unit for each of the following measurements. 1. time: ____ 2. length: __ 3. mass: __ 4. temperature: ____

Explanation:

1. For time, the SI unit is second. This is the base unit of time in the International System of Units (SI), defined based on the cesium - 133 atom's vibrations.
2. For length, the SI unit is meter. It is the base unit of length in SI, originally defined as one ten - millionth of the distance from the equator to the North Pole along a meridian, and now defined more precisely in terms of the speed of light.
3. For mass, the SI unit is kilogram. It is the base unit of mass in SI, defined by a specific platinum - iridium cylinder kept at the International Bureau of Weights and Measures, though there are plans for a more fundamental definition based on physical constants.
4. For temperature, the SI unit is kelvin. The kelvin scale is an absolute temperature scale, with 0 K being absolute zero, and the size of the kelvin is the same as the degree Celsius, but the zero point is different.

Answer:

1. Time: second
2. Length: meter
3. Mass: kilogram
4. Temperature: kelvin