Question

choose the best answers. 4.1 when scientists take measurements, they use ___. a. si units b. english units c. customary units 4.2 what does si stand for? a. scientific instruments of units b. international scientific units c. international system of units

Explanation:

4.1: In scientific measurements, the SI units (International System of Units) are the standard. English and customary units are not the standard for scientific work.
4.2: SI stands for International System of Units, which is a globally - recognized system of measurement units in science.

Answer:

4.1: A. SI units
4.2: C. International System of Units