AP Env Sci Unit 1 & 2

Front

What is the main difference between primary and secondary ecological succession?

Back

Primary succession begins WITHOUT soil, while secondary succession begins WITH soil.

Front

What are pioneer species?

Back

Pioneer species are the first organisms to colonize an area and begin the process of ecological succession.

Front

Which type of ecological succession occurs over a shorter period of time?

Back

Secondary succession occurs over a shorter period of time.

Front

What role do volcanic activity and burning fossil fuels play in ecological cycles?

Back

They play a role in the Carbon Cycle.

Front

What is a keystone species?

Back

A keystone species is a species that helps to hold an ecosystem together.

Front

Define ecological succession.

Back

Ecological succession is the process by which ecosystems change and develop over time.

Front

What is the difference between autotrophs and heterotrophs?

Back

Autotrophs produce their own food (e.g., plants), while heterotrophs consume other organisms for energy.

Front

What is the significance of biodiversity in an ecosystem?

Back

Biodiversity increases resilience, stability, and productivity of ecosystems.

Front

Explain the concept of a trophic level.

Back

A trophic level is a position in a food chain or food web, defined by how organisms obtain energy.

Front

What is the role of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the ecosystem.