The Water Cycle
The Carbon Cycle
The Nitrogen Cycle
Climate Change
Human Impact
100
Water going from a liquid state to a gaseous state.

What is evaporation?

100

Somewhere carbon is stored for an extended amount of time.

What is a carbon Sink?

100

Chemical process by which atmospheric nitrogen is assimilated into organic compounds.

What is fixation?

100
The long-term pattern of weather in an area, typically averaged over a period of 30 years.

What is climate?

100

The burning of carbon emissions.

What is the main source of greenhouse gases?

200

The evaporation of water from plants occurring at the leaves of a plant.

What is transpiration?

200

Largest exchange of carbon dioxide between the atmosphere and the ocean surface. 

What is dissolving and vaporizing?

200

Reverse of nitrogen fixation.

What is denitrification?

200

The burning of fossil fuels causes this effect to occur.

What is the cause of the greenhouse effect?

200

Corals put under stress die from overheating and do this.

What is coral bleaching?

300

Water released from the clouds.

What is precipitation?

300

The burning of coal and other fossil fuels.

What is one of the main causes of carbon emissions in the atmosphere?

300

Nitrogen converted into ammonia or ammonium by bacteria.

What is ammonification?

300

The observable increase in global temperatures; considered caused by human-induced greenhouse gases.

What is global warming?

300

Plastics in the ocean.

What is the main pollutant in the ocean

400

The flow of water beneath Earth's surface.

What is subsurface flow?

400

Fresh rock is exposed and weathered faster than older exposed rock.

What is uplifting?

400

60% of fertilizers don't make it to plants and cause leeching and runoff.

What is the percent of fertilizers that don't make it to plants?

400

A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.

What are fossil fuels?

400
Overuse of pesticides.

What is one of the main threats against all bug life?

500

The movement of water throughout the Earth.

What is the water cycle?

500

Long living trees, oceans, plastics.

What are examples of carbon sinks?

500

Humans contribute twice the terrestrial nitrogen fixation.

What is the amount that humans contribute to nitrogen fixation?

500

A layer in Earth's stratosphere containing a high amount of ozone.

What is the ozone layer?

500

The invention of artificial fertilizers in the 1920s led to vast quantities of nitrogen leaking into soil and waterways. In the last 100 years, the amount of man-made nitrogen present in the environment has doubled.

What are the negative effects of fertilizers?