The fossil of an extinct mollusk from the Cretaceous period identified by a flat, chambered and curled shell.

An underground sheet of permeable rock that groundwater runs through. It is often a source of water for wells and springs.

An organism that uses light or chemical energy to transform inorganic materials, like carbon dioxide, into food.

Named after Aeolus, Greek god of wind, an effect of the wind that transports and deposits sediment or particles.

A soft, solid layer of the Earth’s mantle that flows slowly and moves the Earth’s plates. It’s located approximately 100-200 kilometers below ground level.

From 1775 to 1783, American colonies fought Great Britain for their independence. This war led to the creation of the United States.

Small, rock-like objects that orbit the sun. Most are found in an asteroid belt between the orbits of Jupiter and Mars.

A very fast flow of ice, snow or rock down a mountain.

The layer of gases that encircle the Earth. It can also describe the air or climate in a specific area.

The area above the Arctic Circle, between the North Pole and the treelines of North America, Europe and Asia.

A fan-shaped deposit of sediment found at ground level where a mountain river meets a flat valley or plain.

Adjust to new conditions. In nature, plants and animals often have to adapt when the environment around them changes.

Products and cargo transported by air.

Protection or sanctuary granted by a country to someone who's escaped hostility and poor treatment in his or her own country.

Airway