Ecosystem Energy Flow and Roles

This lesson by Mr. Ve covers the movement of energy in ecosystems, focusing on food chains, food webs, and the roles of autotrophs and heterotrophs. It explains how energy flows in one direction and introduces ecological pyramids, including energy, biomass, and number pyramids. The lesson emphasizes the importance of each organism in the ecosystem and how removing one can impact the entire system.

What do food chains and food webs represent in an ecosystem?

• The flow of nutrients

• The flow of energy

• The flow of air

• The flow of water

Which type of autotroph uses sunlight to produce food?

• Chemosynthetic

• Photosynthetic

• Heterotrophic

• Decomposers

What is the primary role of heterotrophs in an ecosystem?

• To recycle nutrients

• To consume other organisms for energy

• To decompose dead matter

• To produce their own food

Which of the following is NOT a type of heterotroph?

• Omnivore

• Photosynthetic

• Herbivore

• Carnivore

What is the main function of decomposers in an ecosystem?

• To store energy

• To consume plants

• To break down dead or decaying organisms

• To produce energy from sunlight

How does energy flow through an ecosystem?

• In multiple directions

• In a circular pattern

• In one direction

• In a random pattern

Which cycle is NOT mentioned as a matter cycle in the ecosystem?

• Carbon cycle

• Water cycle

• Nitrogen cycle

• Oxygen cycle

What does the pyramid of energy illustrate?

• The number of organisms at each trophic level

• The total mass of organisms at each trophic level

• The energy available at each trophic level

• The diversity of species at each trophic level

According to the 10% rule, how much energy is transferred to the next trophic level?

• 50%

• 20%

• 10%

• 5%

What does the pyramid of biomass measure?

• The energy at each trophic level

• The diversity of species in an ecosystem

• The total mass of organisms in a given area

• The number of organisms at each trophic level