continental drift
what is the theory that continents slowly moved over time
continental drift
physical evidence of life in the past
fossils
3 types of rocks
Igneous
sedimentary
metamorphic
The main cause of a tsunami.
underwater earthquakes
what are the names of the mechanical layers of the earth
lithosphere
asthenosphere
mesosphere
a supercontinent that existed from about 335 to 175 million years ago
pangea
era known as age of mammals
Mesozoic
This rock type is formed from the cooling and hardening of magma or lava.
igneous rock
4 types of volcanos
cinder cones
volcanoes
composite
dome
what are the compositional layers from deepest to the surface
inner core, outer core, mantle, crust
what is a hotspot
a area of plume from the mantle
This period known for ancient forests
Carboniferous period
Fossils are most commonly found in this type of rock, which is formed from compacted and cemented sediment.
sedimentary rocks
A sudden and violent shaking of the ground caused by the movement of tectonic plates.
an earthquake
What is the primary method that scientists use to study the Earth's interior
seismic waves
when two tectonic plates collide
Convergent boundarie
he longest part of Earth's history spanning from the planet's formation to the beginning of the Paleozoic Era.
Precambrian Time
The continuous process by which rocks are created changed from one type to another and destroyed
rock cycle
The Ring of Fire a major area in the Pacific Ocean is known for a high frequency of these erupting landforms
volcanoes
This layer beneath the crust is the thickest layer of the Earth
mantle
key evidence suggest that South America and Africa were once joined?
matching fossil and rock formations found on both continents
These geological units are based on major changes in life forms and geological events as evidenced in the rock record
eras
periods
epochs
Rocks that have been changed by intense heat and pressure deep within Earth's crust
metamorphic rocks
this is a process of erosion where material is transported and worn away by wind or water.
weathering and erosion
What evidence suggests that the Earth's outer core is liquid?
the behavior of seismic S waves which cannot travel through a liquid