Our planet rests upon layers of rock, which can be classified into three primary categories: igneous, sedimentary, and metamorphic. Igneous rocks originate from the cooling of lava, while sedimentary rocks are formed from the compression of fragments of other rocks. Metamorphic rocks arise from existing rocks that undergo heat, pressure, or both. As the Earth's surface transforms, rocks can transition from one type to another, a process that requires specific conditions and significant time to occur.
Show
Beast Tamer
Episode
S03E04
Air Date
Feb 03, 1995
Season 3 Episodes
S03E01
Planets & Moons
S03E02
Pressure
S03E03
Plants
S03E04
Rocks & Soil
S03E05
Energy
S03E06
Evolution
S03E07
Water Cycle
S03E08
Friction
S03E09
Germs
S03E10
Climates
S03E11
Waves
S03E12
Ocean Life
S03E13
Mammals
S03E14
Spinning Things
S03E15
Fish
S03E16
Human Transportation
S03E17
Wetlands
S03E18
Birds
S03E19
Populations
S03E20
Animal Locomotion