Define the si units for length, mass, time and temperature

Length: meter (m)

mass: kilogram (kg)

time: second (s)

temperature: Kelvin (K)

Explanation:

The International System of Units (SI) is used in almost every country in the world.  

This system was created in 1960 by the 11th General Conference of Weights and Measures in France and is made up of seven basic units:  

-Ampere (electric current)  

-Kelvin   (temperature)  

-Second   (time)  

-Meter   (length)  

-Kilogram   (mass)  

-Candela   (luminous intensity)  

-Mol (amount of substance) *added to the system in 1971  

Plus an unlimited number of derived units from the main ones.

-be a crystalline solid

- be soluble in water

-conduct electricity

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a) the particles of the chair are strongly held together.