continent
any of Earth's main continuous areas of land such as Africa, Asia, etc.
eruption
the sudden pushing out of something such as lava from a volcano
geyser
a natural spring that sends hot water and steam suddenly into the air from a a hole in the ground.
fossil
evidence of life from the past, such as fossilized bones, footprints or leaf prints
landform
a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
lava
hot liquid rock on the surface of the Earth
magma
hot liquid rock below the surface of the Earth
mesosaurus
an extinct reptile that lived about 300 million years ago
model
an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
rifting
the slow pulling apart of land that is caused by plate movement
surface
the outside layer; the top
system
a group of interacting, interrelated, or interdependent elements or parts that function together as a whole to accomplish a goal.
Paleontologist
a scientist who studies fossils or bones