The video explains how ecosystems are formed through the interaction of communities with their physical environment, including non-living elements like sunlight, soil, water, and temperature. It highlights that ecosystems encompass all interacting communities within a physical environment. Examples provided include forest, marine, grassland, and desert ecosystems.

What forms an ecosystem?

• Interaction of non-living things with each other

• Interaction of communities with their physical environment

• Only non-living things

• Only living organisms

Which of the following is NOT a component of an ecosystem?

• Temperature

• Buildings

• Sunlight

• Communities

What does an ecosystem contain?

• Only plants

• All communities interacting in their physical environment

• Only animals

• Only water bodies

Which of the following is an example of a marine ecosystem?

• Desert

• Forest

• Ocean

• Grassland

Which ecosystem is characterized by low rainfall and high temperatures?

• Desert

• Forest

• Marine

• Grassland