Food Chains and Food webs

What are consumers?

• Organisms that produce their own food

• Organisms that rely on consuming other organisms for energy

• Organisms that can photosynthesize

• Organisms that decompose organic matter

What is an example of a food chain?

• Grass (producer) → Grasshopper (primary consumer) → Frog (secondary consumer) → Owl (tertiary consumer)

• Sunflower (producer) → Caterpillar (primary consumer) → Bird (secondary consumer) → Fox (tertiary consumer)

• Tree (producer) → Squirrel (primary consumer) → Snake (secondary consumer) → Eagle (tertiary consumer)

• Algae (producer) → Fish (primary consumer) → Seal (secondary consumer) → Shark (tertiary consumer)

What is the role of secondary consumers in a food chain?

• They are producers that create energy from sunlight.

• They are herbivores that eat plants and are the first level in a food chain.

• They are carnivores or omnivores that eat primary consumers and are the third level in a food chain.

• They are decomposers that break down dead organic matter.

What is the significance of producers in an ecosystem?

• Producers are the primary consumers in an ecosystem.

• Producers are crucial as they form the base of the food chain, providing energy for all other organisms.

• Producers are organisms that decompose organic matter.

• Producers are the top predators in an ecosystem.

How does energy transfer in a food chain?

• Energy transfer in a food chain is efficient; about 90% of the energy is passed to the next level.

• Energy transfer in a food chain is inefficient; only about 10% of the energy from one trophic level is passed to the next level, with the rest lost as heat.

• Energy transfer in a food chain occurs without any loss of energy.

• Energy transfer in a food chain is constant; energy levels do not change between trophic levels.

What is a trophic level?

• A position in a food chain that indicates an organism's role in energy flow and nutrient cycling.

• A type of ecosystem that supports various species.

• The total number of organisms in a specific habitat.

• A measure of the biomass in a given area.

What is an example of a decomposer?

• Mushroom

• Grass

• Oak Tree

• Sunflower

What is a food chain?

• A circular diagram showing the interdependence of species in an ecosystem.

• A linear sequence that shows how energy and nutrients flow from one organism to another in an ecosystem, starting from producers to various levels of consumers.

• A method of classifying organisms based on their habitat.

• A representation of the food web that includes only herbivores.

What happens to energy as it moves up the food chain?

• It increases significantly at each trophic level.

• It remains constant throughout the food chain.

• It decreases significantly at each trophic level, leading to fewer organisms at higher levels.

• It is completely transferred to the next level without loss.

What is competition in a food web?

• A. Competition occurs when species cooperate for resources.

• B. Competition in a food web occurs when different species vie for the same resources, such as food, space, or mates, affecting their populations.

• C. Competition is the process of species evolving to fill different niches.

• D. Competition happens only between predators for prey.