Plate Boundaries
Shaping the Crust
Follow the Carbon
Reading the Rocks
Journey to the Center of the Earth
100

This type of boundary occurs where two tectonic plates are moving away from each other, often creating new oceanic crust.

divergent boundary

100

This specific destructive process occurs at convergent boundaries when one tectonic plate is forced beneath another, leading to the melting and destruction of the descending plate.

subduction

100

This gaseous molecule is the primary form of carbon found in the atmosphere, acting as a greenhouse gas that regulates Earth's climate.

carbon dioxide

100

According to the "Precambrian Events" timeline, the "Oxygen Revolution" occurred between 2.4 and 2.1 billion years ago when oxygen escaped from the oceans into this reservoir.

Earth's atmosphere

100

This is the outermost and thinnest layer of the Earth, split into continental and oceanic varieties, upon which we all live.

Crust 

200

The violent grinding of two plates sliding horizontally past one another occurs at this type of conservative boundary, famous for causing earthquakes.

Transform Boundary 

200

This surface process involves the accumulating of sediment and debris in a specific location, resulting in the formation of new landforms like deltas and beaches.

deposition

200

Holding roughly 50 times more carbon than the atmosphere, this is the largest carbon reservoir in the Earth system. 

Ocean

200

 Looking at the "Life on Earth" column for the Devonian Period, New York State is explicitly noted as being the home to these, located in Gilboa and Cairo.

Earth's earliest forests

200

Making up about 84% of Earth's total volume, this thick, hot layer of rock sits directly beneath the crust and drives tectonic plate movement.

Mantle 

300

This type of boundary occurs where two plates collide, often forcing one plate beneath the other or buckling up into massive mountain ranges.

convergent boundary

300

Mechanical, chemical, or biological means can all drive this destructive process, which breaks down rocks and minerals into smaller pieces to create landforms like caves and arches.

weathering

300

This human activity exacerbates global warming by actively cutting down trees, which reduces the amount of CO2 removed from the air.

deforestation

300

During the Carboniferous Period, this specific Epoch spanning 315 to 307 million years ago saw extensive coal-forming vegetation pack into ancient swamps.

Middle Pennsylvanian Epoch

300

This specific layer is the only entirely liquid layer of the Earth's interior, composed primarily of molten iron and nickel.

Outer Core 

400

At a convergent boundary, this specific geological process occurs when a denser oceanic plate sinks beneath a lighter continental plate into the mantle.

subduction

400

These underwater mountain ranges form as a constructive process where tectonic plates pull apart, creating brand new sea-floor crust.

mid-ocean ridges

400

Beside the atmosphere and the oceans, carbon is securely stored deep underground in rocks, soil, and these ancient, energy-rich organic deposits.

Fossil Fuels 

400

This is a rock-like structures formed by the growth of layers of microorganisms, such as cyanobacteria, in shallow water environments.

Stromatolites

400

This mechanical layer, whose name comes from the Greek word for "weak," is the upper portion of the mantle where rocks flow like hot plastic under immense heat and pressure.

asthenosphere

500

The Mid-Atlantic Ridge is a famous example of a divergent boundary, while this specific California fault line is the world's most famous example of a transform boundary.

San Andreas Fault

500

These deep sea-floor features form destructively where tectonic plates collide, forcing one plate to subduct beneath another.

trenches

500

This specific chemical flux occurs when humans burn fossil fuels, rapidly accelerating the release of greenhouse gases into the air.

combustion

500

For $200: This massive global event marks the boundary line at 66 million years ago, separating the Cretaceous Period of the Mesozoic Era from the Paleogene Period of the Cenozoic Era.

mass extinction

500

Despite being hotter than the surface of the Sun, the inner core remains a solid sphere due to this intense physical force.

immense pressure