Energy Flow in Ecosystems

Teacher MJ introduces energy flow in ecosystems, focusing on energy roles like producers, consumers, and decomposers. The video explains how energy moves through ecosystems via food chains and webs, and the concept of energy pyramids. Students are tasked with creating their own food chains and webs as homework.

What is the primary source of energy for life on Earth?

• Geothermal

• Sun

• Water

• Wind

Which organisms are responsible for converting solar energy into chemical energy?

• Producers

• Consumers

• Scavengers

• Decomposers

Which of the following is an example of a producer?

• Dog

• Lion

• Vulture

• Algae

What type of consumer is a giraffe?

• Carnivore

• Omnivore

• Herbivore

• Scavenger

Which of the following animals is a scavenger?

• Vulture

• Eagle

• Koala

• Elephant

What role do decomposers play in the ecosystem?

• They hunt and eat other animals.

• They break down dead organisms and recycle nutrients.

• They consume only plants.

• They produce food for other organisms.

How is energy transferred in an ecosystem?

• Through the nitrogen cycle

• Through the food chain

• Through the water cycle

• Through the carbon cycle

What is a food web?

• A single chain of energy transfer

• A pyramid showing energy levels

• A diagram showing energy loss

• A network of interconnected food chains

What percentage of energy is typically transferred from one trophic level to the next?

• 5%

• 25%

• 50%

• 10%

Where is the most energy available in an energy pyramid?

• At the producer level

• At the middle level

• At the consumer level

• At the top level