Answer
a. matter
b. not matter
c. matter
d. not matter
e. matter
f. matter
Work Step by Step
a. A baby is matter because a baby has has volume and mass.
b. An idea is not matter because it has neither volume nor mass.
c. The Empire State building is matter because the Empire State building has both volume and mass
d. An emotion is not matter because it has no volume and no mass.
e. The air is matter because, despite it not appearing so to human eyes, it has both volume (more visible in certain conditions, such as in a balloon) and mass.
f. Alpha Centauri is matter because it, being a star, has both volume and mass.
