Food Chains and Food Webs in Ecosystems

This video lesson from Bahamas Educational Express covers the concepts of food chains and food webs. It explains how energy flows through ecosystems, starting with producers like plants, moving to consumers such as animals, and ending with decomposers like mushrooms. The lesson provides examples of simple food chains and trophic pyramids, highlighting the roles of primary, secondary, and tertiary consumers. It also introduces the concept of food webs, which are combinations of multiple food chains. The video concludes with an exercise to identify parts of a food chain, emphasizing the sun as the primary energy source.

What is the primary focus of this lesson video?

• The process of photosynthesis

• The life cycle of plants

• The food chain and food web

• The water cycle

What is the main source of energy for all living things?

• Air

• Water

• The sun

• Soil

Which of the following is a producer in an ecosystem?

• A worm

• A plant

• A mushroom

• A lion

What role do decomposers play in the ecosystem?

• They produce their own food

• They eat other animals

• They provide energy for the sun

• They break down dead plants and animals

In a simple food chain, which of the following is a primary consumer?

• A plant

• A rat

• A mushroom

• A cat

What is a trophic pyramid?

• A map of the solar system

• A representation of the food chain levels

• A diagram showing the layers of the earth

• A structure showing the flow of water

Who are the tertiary consumers in a food chain?

• Those who eat plants

• Those who decompose organic matter

• Those who eat primary consumers

• Those who eat secondary consumers

What is a food web?

• A network of water currents

• A combination of several food chains

• A map of animal habitats

• A single line of energy flow

Which of the following is a secondary consumer in the given example?

• The sun

• The bird

• The plant

• The worm

In the practical exercise, what is identified as the energy source?

• The worm

• The plant

• The sun

• The bird