Oceans
Groundwater, Aquifers, and Rivers
Climate and Biomes
Biogeochemical Cycles
Populations
100

The amount of salt dissolved in water

What is salinity? 
100

The percentage of pore spaces in rock

What is porosity? 

100

The average weather conditions in an area over a long period of time

What is climate? 

100

The law that sates that matter is not created or destroyed, only changed in form

What is the Law of Conservation of Matter? 

100

A group of organisms that can reproduce and produce fertile offspring 

What is a species? 
200

The major source of salt in the ocean

What is the chemical weathering of rocks? 

200

The groundwater zone that contains rock where all pore spaces are filled with water

What is the Zone of Saturation? 
200

The two main factors that are used to classify a region's climate

What are temperature and precipitation? 

200

The three main biogeochemical cycles

What are the water cycle, carbon cycle, and the nitrogen cycle? 

200

A group of interacting individuals of the same species in a specific area 

What is a population? 

300

An area of rapid temperature change as water increases in depth

What is the thermocline? 

300

A layer of saturated, porous rock that acts as a natural underground storage for grounwater

What is an aquifer?

300

The main factor used to classify a biome

What is plant life? 

300

Something that releases more carbon dioxide that it absorbs

What is a carbon source? 

300

The maximum population size an ecosystem can sustain 

What is carrying capacity? 

400

Large circular patterns of surface currents 

What are gyres? 

400

A large land area that contributes water to a river

What is a river basin? 

400

The most biodiverse biome

What is the tropical rainforest? 

400

The process that turns N2 gas into a form of usable nitrogen 

What is nitrogen fixation? 

400

Organisms that make their own food

What are autotrophs? 

500

The rising of cold, nutrient-rich water from the bottom of the ocean

What is upwelling? 

500

The primary force that drives the flow of rivers and streams

What is gravity? 

500

Permanently frozen subsoil in the tundra

What is permafrost? 

500

The phase of the water cycle where water soaks into the soil 

What is infiltration? 

500

Concentration of pollutants increasing in organisms higher up in the food chain 

What is biomagnification?