Food Chain Ecosystem Dynamics

The video tutorial demonstrates a food chain simulation using a gizmo. Initially, all species are healthy, and the simulation is run to observe the balance. The instructor then introduces a disease affecting rabbits, leading to a decrease in their population, which subsequently affects the snake and hawk populations. Further scenarios are explored by introducing diseased snakes and reducing the snake population, showing the cascading effects on the food chain.

What does the initial setup of the food chain gizmo represent?

• An ecosystem with diseased animals

• A balanced ecosystem with healthy populations

• A food chain with only herbivores

• A scenario with no predators

What happens to the snake population when the rabbits become diseased?

• The snake population remains the same

• The snake population doubles

• The snake population increases

• The snake population decreases

How does the hawk population change when the rabbit population decreases?

• The hawk population increases

• The hawk population decreases

• The hawk population remains the same

• The hawk population triples

What is the effect of making snakes diseased while keeping rabbits healthy?

• The hawk population increases

• The snake population increases

• The hawk population decreases

• The rabbit population decreases

What happens to the hawk population when the number of snakes is reduced?

• The hawk population quadruples

• The hawk population increases

• The hawk population decreases

• The hawk population remains the same

Why do changes in one part of the food chain affect the entire ecosystem?

• Because all species are interconnected

• Because herbivores control the ecosystem

• Because all species are independent

• Because predators are not important

What is the main lesson from the food chain gizmo experiment?

• Diseases do not affect animal populations

• Changes in one species can impact the entire food chain

• Predators have no effect on the ecosystem

• Herbivores are the most important in the ecosystem