Food Chains and Energy Flow

The video tutorial explains food chains and food webs, highlighting how energy flows through these systems. It covers the roles of herbivores, carnivores, scavengers, and decomposers, and how food chains connect to form food webs. The concept of energy transfer from sunlight to plants and animals is discussed, along with the energy pyramid that illustrates energy loss at each level of the food web.

What is the primary function of a food chain?

• To describe the habitat of animals

• To explain the life cycle of plants

• To illustrate the pattern of eating and being eaten

• To show how energy is created

Which of the following is a component of a food chain?

• A producer

• A decomposer

• A predator

• A scavenger

How do food chains connect to form a food web?

• When an animal from one chain eats a member of another chain

• When two animals share the same habitat

• When two ecosystems overlap

• When plants and animals coexist

What is an ecosystem?

• A group of similar species

• A type of habitat

• A community of living and non-living things in an area

• A single food chain

What is the primary source of energy for most food chains?

• Water

• Soil

• Air

• Sunlight

How do green plants contribute to the food chain?

• By consuming other plants

• By providing shelter

• By trapping sunlight to make food

• By decomposing dead matter

What happens to energy as it moves through a food chain?

• It increases

• It is stored

• It remains constant

• It is lost

Why are there fewer carnivores than herbivores in a food web?

• Herbivores reproduce faster

• Carnivores require more space

• Energy is lost at each level of the food web

• Carnivores are less efficient hunters

What does the energy pyramid illustrate?

• The number of species in an ecosystem

• The growth rate of plants

• The decrease in energy at higher levels of a food web

• The migration patterns of animals

Why is the energy pyramid wide at the bottom and narrow at the top?

• Because carnivores are larger than herbivores

• Because energy is lost as it moves up the pyramid

• Because energy is abundant at the top

• Because there are more plants than animals