absolute time

acid rain

atmospheric cycle

Big Bang Theory

cleavage

convection currents

Earth’s inclination

fossil record

fracture

geochemical cycle

geologic cycle

glaciers

global warming

gravitational effects

greenhouse effect

hydrologic cycle

Mohs scale

oscillating/pulsating theory

ozone depletion

paleoclimates

paleomagnetism

physiographic region

plate tectonics

plate boundaries

(convergent, divergent)

radioactive decay

relative time

topographic map

tsunami

solar flares

superposition

tectonic cycle