List at least 4 properties of magnetic field lines

What is the independent variable in this investigation? mass volume sample number substance density

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Asolid that forms and separates from a liquid mixture is called