Energy Flow in Ecosystems

The video explains the sources of food from plants and animals, the process of photosynthesis, and the roles of herbivores and carnivores in the food chain. It introduces the concept of decomposers and simple food chains, then expands to complex food webs. The video also covers energy transfer through the food chain, highlighting the energy pyramid and the loss of energy at each level. Finally, it concludes with a call to explore more resources on the topic.

What process do plants use to create their own food?

• Digestion

• Fermentation

• Photosynthesis

• Respiration

In a food chain, what are organisms that produce their own food called?

• Consumers

• Decomposers

• Scavengers

• Producers

What role do fungi and bacteria play in the food chain?

• Secondary consumers

• Decomposers

• Primary consumers

• Producers

What is a food web?

• A chain with only carnivores

• A network of interconnected food chains

• A chain with only herbivores

• A simple linear food chain

Why do living beings need food?

• For photosynthesis

• To create water

• For energy and growth

• To produce light

What percentage of energy is typically lost when it is transferred from one level of the food chain to the next?

• 10%

• 50%

• 90%

• 100%

What is the energy pyramid?

• A diagram showing energy flow in a food web

• A structure that stores energy

• A pyramid made of food

• A chart showing the number of organisms

How much energy does a giraffe receive from a plant if the plant absorbs 1,000 units of energy from the sun?

• 100 units

• 900 units

• 1,000 units

• 10 units

What happens to the energy when a lion eats a giraffe?

• All energy is transferred to the lion

• 90% of energy is lost

• Energy is doubled

• Energy is stored in the giraffe

What is the primary source of energy for most living species?

• Water

• The sun

• The moon

• The soil