Hydrology
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100

The movement of water from the soil surface into the ground is known as this process.

What is infiltration (percolation)?

100

This type of cloud is most commonly associated with thunderstorms.

What is cumulonimbus?

100

This landform forms where a river deposits sediment as it enters a lake or ocean.

What is a delta?

100

This is the measure of how acidic or basic a solution is.

What is pH?

100

This major river starts in southeastern Arizona before briefly passing through Mexico, then running north through Tucson.

What is the Santa Cruz River?

200

What transport process causes solutes to move even when groundwater velocity is zero?

What is diffusion (dispersion)?

200

This type of front forms when a cold front overtakes a warm front.

What is an occluded front?

200

The Prime Meridian passes through this location.

What is Greenwich?

200

What is the half-life of Carbon-14?

What is 5730 years? [ +- 40 years (5690 - 5770 years)]

200

This artist was the first to win a Grammy for Album of the Year with a primarily Spanish-language album.

Who is Bad Bunny?

300

Which snow property tells us how much liquid water will be released when the snowpack completely melts?

What is Snow Water Equivalent (SWE)?

300

This law describes the wavelength of peak emission of an object based on its temperature.

What is Wien’s Law or Wien’s Displacement Law?

300

This location is furthest from any landmass, with the closest people located on the ISS.

What is Point Nemo?

300

This is a planar, hexagonal structure with alternating single and double carbon bonds.

What is a benzene ring?

300

The most-streamed song on Spotify in 2025.

What is “Die With A Smile” by Lady Gaga and Bruno Mars?

400

A hydrogeologist fixes the flux in a groundwater model. What boundary condition types are they using?

What is a Type II (Neumann) boundary condition?

400

This index measures the potential for buoyant convection and thunderstorms.

What is CAPE?

400

Continental drift was first proposed by this scientist in 1912.

Who is Alfred Wegener?

400

This oxygen isotope is found in higher concentrations in the ocean during glacial periods.

What is oxygen-18 (¹⁸O)?

400

This cult classic film originated the hyperspace effect later popularized by the Star Wars films.

What is Dark Star?

500

Which infiltration model assumes a sharp wetting front moving downward into the soil?

What is a Green-Ampt Model?

500

This thermodynamic variable describes a parcel of air if it were lifted until all moisture were condensed out, and then brought down dry adiabatically to 1000 mb.

What is Equivalent Potential Temperature?

500

This resolution describes the number and width of wavelength bands a sensor records.

What is Spectral Resolution?

500

The sum of all dissolved minerals and salts in water is called this.

What are total dissolved solids (TDS)?

500

This discipline of paleoclimatology got its start at the University of Arizona.

What is dendrochronology (or dendroclimatology)?