Earth's Structure
This thin outer layer of Earth is thicker under continents than under oceans.
Crust
Earth’s orbit is shaped like this.
Ellipse
Geology literally means the study of the ________.
Earth
Earth’s magnetic field protects us from harmful ________.
Earth’s crust is broken into these large divisions.
Tectonic Plates
Scientists study these waves to learn what’s inside the Earth.
Seismic Waves
This causes the seasons on Earth.
Earth's Axis Tilt
Secular scientists believe Earth is about this old.
4 Billion Years
If Earth were farther from the sun, most water would do this.
Freeze
This theory can be explained within a young‑earth worldview.
Plate tectonics
This boundary marks the bottom of the crust.
Moho
Earth is the only planet with this life‑supporting liquid on its surface.
Liquid Water
Young‑earth creationists believe Earth is about this old.
6,000–7,000 years
Earth’s atmosphere is unique because it is ________ for life.
designed (or suitable) for life
Gravity and magnetic sensors help scientists map deep Earth structures all the way to this layer.
The core
This soft, partially molten zone lies in the upper mantle.
Asthenosphere
This planet’s gravity helps keep dangerous asteroids away from Earth.
Jupiter
Modern geologists prefer this term instead of “uniformitarian.”
Neo-catastrophist
Carbon dioxide stays a gas instead of forming icy clouds because Earth is in this zone.
the habitability zone
Building a model of earthquake faults uses present‑day data, so it belongs to this type of geology.
operational geology
Earth’s core is mostly made of this metal.
Iron
Earth’s location between the Milky Way’s spiral arms gives us this scientific advantage.
A clear view of the heavens
This viewpoint assigns very long ages to rocks and Earth’s history.
the deep‑time viewpoint
Secular scientists say Earth’s life‑supporting features happened by this process.
chance/natural processes
This layer of Earth contains both a solid part and a liquid part.
The Core