Amineral
a. has a chemical formula.
c. has a characteristic internal structure.
b. occurs naturally.
d. all of the above.

What is the earth matial ot igneous rock

The covers all of earth like a thin shell,but it is not a solid sheet of material.it is broken up into several large sections and many smaller ones. fill in the blank.

Which events occurred during the space race? check all that apply. (a) nasa was established. (b) yuri gagarin orbited earth. (c) the soviet union launched salyut. (d) the united states launched skylab. (e) the united states launched explorer 1.