The nucleus of an atom is
a. the central core and is composed of pro-tons and neutrons
b. positively charged and has more protons than neutrons
c. negatively charged and has a high density
d. negatively charged and has a low density

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

__can be defined as which velocity changes

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.