Ecological Relationships
Ecosystem Stability and Disruption
Carbon and Nitrogen Cycles
Human Impact and Biodiversity
100

This is the type of relationship where both organisms benefit.  

What is mutualism?


100

This term refers to the variety of life in an ecosystem.

What is biodiversity?


100

This process allows plants to take in carbon dioxide and make food.

What is photosynthesis?


100

This occurs when natural environments are destroyed for human use.

What is habitat destruction?


200

This relationship involves one organism benefiting while the other is unaffected.

What is commensalism?


200

This species has a disproportionately large effect on its ecosystem relative to other organisms. (If this organism dies out, the ecosystem is greatly affected)

What is a keystone species?


200

This process releases carbon dioxide when organisms break down food.

What is cellular respiration?


200

This is the introduction of harmful substances into the environment.

What is pollution?


300

This type of relationship is shown when a tick feeds on a dog.

What is parasitism?


300

This type of succession begins on bare rock with no soil.

What is primary succession?


300

This process converts nitrogen gas into a usable form for plants.

What is nitrogen fixation?


300

This human activity removes trees and reduces species diversity.

What is deforestation?


400

This occurs when two species fight over the same limited resource.

What is competition?


400

This type of species causes harm when introduced to a new ecosystem.

What is an invasive species?


400

These organisms break down dead matter and return nitrogen to the soil.

What are decomposers?


400

This long-term change in Earth’s temperature affects ecosystems worldwide.

What is climate change?


500

This interaction helps regulate population sizes by one organism feeding on another.

What is predation?

500

These events, like hurricanes or wildfires, can both damage and improve ecosystems over time.

What are natural disasters?


500

This type of human activity, such as burning fossil fuels, increases carbon in the atmosphere.

What is fossil fuel combustion (or burning fossil fuels)?

500

These are actions humans can take, such as conservation or reducing pollution, to protect biodiversity.

What are sustainable practices?

M
e
n
u