Which of the following is NOT a way planets heat up during formation. Radioactivity
Differentiation
Convection
Accretion

The answer is : B. Differentiation

Hope this helps

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.