Ecosystem Relationships and Dynamics

The video tutorial for grade five students covers how organisms interact within an ecosystem, focusing on competition and predation. It explains the concept of limiting resources and how they lead to competition among organisms. The tutorial also discusses how organisms can avoid competition by occupying different niches and habitats. Finally, it explores predator-prey relationships, illustrating how predators hunt and consume their prey.

What are the two main types of relationships discussed in the lesson?

• Symbiosis and mutualism

• Competition and predation

• Parasitism and commensalism

• Mutualism and predation

What is a limiting factor in an ecosystem?

• A resource that is not sufficient for all organisms

• A resource that is abundant

• A resource that is not needed

• A resource that is only used by plants

Which of the following is considered a nonliving resource in an ecosystem?

• Sunlight

• Fungi

• Animals

• Plants

What happens to a population if resources are not enough?

• The population remains the same

• The population size decreases

• The population size increases

• The population becomes extinct

What is competition in an ecosystem?

• Sharing resources equally

• Cooperation between species

• Fighting for limited resources

• Avoiding each other

How can organisms avoid competition?

• By having different niches and habitats

• By fighting more

• By living in the same habitat

• By having the same niche

What strategy might animals use to avoid competition for water?

• Using water at different times of the day

• Avoiding water altogether

• Fighting for water

• Sharing water equally

What is a predator-prey relationship?

• A relationship where organisms avoid each other

• A relationship where organisms share resources

• A relationship where one organism eats the other

• A relationship where both organisms benefit

In a predator-prey relationship, what is the prey?

• The organism that hunts

• The organism that shares food

• The organism that is hunted and eaten

• The organism that provides shelter

Which of the following is an example of a predator?

• Grass

• Lion

• Zebra

• Water