Define SI units. Also mention their importance. SI unit The​

SI unit is an internationally accepted system and have the same value all over the world .

I don't know the importance sotry

SI unit is an internationally accepted system that have same value all over the world.

i would like to make dinner for my mom, dad, and sister

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.