Liquid
Solid
Molten
None of these
December 2, 1984
December 2, 2001
December 2, 2004
Earthquake
Fire
Drought
Sea Floor Spreading
Plate Tectonics
Continental Drift
Suspension
Solution
Corrosion
The velocity
The competence
The capacity
Eskers
Drumlins
Till
Useful
Harmful
Poisonous
Shield volcanoes
Caldera
Cinder cones
Dust particles
Fine particles
Sand grains