Journey to the Center
This is the third planet from the Sun and the only known planet to support life.
What is Earth?
A wave of energy caused by the sudden breaking of rock within the Earth or may be due to an explosion.
What is a seismic wave
These are large, rigid pieces of Earth’s lithosphere that slowly move over the asthenosphere.
What is a tectonic plates
These are the three main types of plate boundaries, classified according to how tectonic plates move relative to one another.
What are convergent, divergent, and transform boundaries?
This sudden shaking of the ground occurs when energy is released as tectonic plates move along faults.
What is an earthquake?
Refers to the solid part of the Earth, including the rocks, minerals, landforms, and the processes that shape them.
What is Geosphere?
This instrument detects and records the vibrations produced by earthquakes and other seismic activity.
What is a seismograph?
This was the supercontinent that existed millions of years ago when most of Earth’s present-day continents were joined together.
What is Pangaea?
This famous fault in California is an example of a transform boundary, where two tectonic plates slide horizontally past each other.
What is the San Andreas Fault?
This opening in Earth’s crust allows magma, ash, and gases to reach the surface.
What is a volcano?
These are the four main layers that make up the Earth, arranged from the outermost layer to the innermost layer.
What are the crust, mantle, outer core, and inner core?
A type of seismic wave that travels below the surface of the Earth. There are two types, both of which can travel through the interior of Earth’s crust, hence, they are the first to arrive at a location.
What are Body Waves?
This German scientist proposed the Continental Drift Theory in 1912, suggesting that the continents were once joined together and gradually moved apart.
Who is Alfred Wegener?
This technology uses satellites to precisely measure the movement of points on Earth's surface, providing evidence that tectonic plates are constantly moving.
What is GPS (Global Positioning System)?
This is a break or fracture in Earth’s crust where blocks of rock can move relative to each other, often causing earthquakes.
What is a Fault
This semi-solid, plastic-like layer of the upper mantle lies beneath the lithosphere and allows tectonic plates to move.
What is the asthenosphere?
This is the fastest type of seismic wave because it can travel through both solid and liquid materials, including the liquid layers of Earth.
What is P-Wave
These are two important discoveries associated with Harry Hess that provided evidence for the movement of tectonic plates and the development of the theory of plate tectonics.
What are mid-ocean ridges and seafloor spreading?
This mountain range formed when the Indian Plate collided with the Eurasian Plate, causing the crust to compress and rise over millions of years.
What is the Himalayan Mountain Range?
This underground reservoir stores molten rock beneath a volcano and can supply magma that eventually erupts at the surface.
What is a magma chamber?
This liquid layer is composed mainly of molten iron and nickel. Its movement generates Earth’s magnetic field, which helps protect the planet from the solar wind.
What is outer core
It is this property of this seismic wave that led seismologists to conclude that the Earth's outer core is a liquid.
What is S-Wave
This process involves the slow movement of hot material rising and cooler material sinking within the mantle, helping drive the movement of tectonic plates.
What are mantle convection currents?
This is a region where one tectonic plate sinks beneath another and descends into the mantle, commonly forming deep-ocean trenches and volcanic activity.
What is a subduction zone?
This horseshoe-shaped region around the Pacific Ocean is known for frequent earthquakes and numerous active volcanoes due to tectonic plate interactions.
Pacific Ring of Fire