Food Webs, Energy Pyramids, & Cycling Matter

Front

What is a food web?

Back

A food web is a complex network of feeding relationships among various organisms in an ecosystem, showing how energy and nutrients flow through different trophic levels.

Front

What is an energy pyramid?

Back

An energy pyramid is a graphical representation that shows the flow of energy at different trophic levels in an ecosystem, with producers at the base and top predators at the top.

Front

Which level of the energy pyramid has the most energy?

Back

The bottom level (producers) has the most energy.

Front

What happens to energy as you move up the energy pyramid?

Back

Energy decreases as you move up the energy pyramid due to energy loss at each trophic level.

Front

What is nitrogen fixation?

Back

Nitrogen fixation is the process of converting nitrogen gas from the atmosphere into a form that plants can use, often facilitated by bacteria or lightning.

Front

How do animals obtain nitrogen?

Back

Animals obtain nitrogen by eating plants or other animals that contain nitrogen.

Front

What gas is released into the atmosphere when organic matter is burned?

Back

Carbon dioxide is released into the atmosphere when organic matter is burned.

Front

What role do decomposers play in the cycling of matter?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and making them available for plants.

Front

What is the primary source of energy for most ecosystems?

Back

The primary source of energy for most ecosystems is the sun.

Front

What is a trophic level?

Back

A trophic level is a position in a food chain or food web that indicates the organism's role in the flow of energy and nutrients.