2. Geologists often use the scientific method and supporting data to propose new ideas and test the validity of these ideas. These new ideas are called:
3. The current idea that governs our understanding of planetary systems is called:
a. planetismal theory
b. Collision Theory
c. Nebular Theory
d. Differentiation Theory
4. Largely due to information gathered by the Apollo missions, the moon is thought to be:
a. made of cheese
b. a captured comet.
C, a portion of the Earth sucked out by a close meteor encounter.
D. a portion of the Earth blasted into space by a large protoplanetary collision.