Energy Sources and Ecosystem Roles

The video explains how energy is essential for all living organisms, detailing how they obtain it from food. Plants create their own food through photosynthesis, using sunlight, water, and carbon dioxide. This energy is transferred through ecosystems as animals consume plants and other animals. Decomposers play a crucial role in recycling nutrients by breaking down dead matter. The video emphasizes the interconnectedness of ecosystems and the central role of the sun as the primary energy source.

What do all organisms need to perform activities and survive?

• Companionship

• Shelter

• Energy

• Water

How do plants obtain the energy they need to make their own food?

• By using sunlight, carbon dioxide, and water

• By eating other plants

• By consuming small insects

• By absorbing nutrients from the soil

Which of the following is a primary source of energy for herbivores?

• Plants

• Insects

• Fungi

• Meat

Which of the following is an example of an omnivore?

• Sea turtle

• Grizzly bear

• Ladybug

• Mushroom

What role do decomposers play in an ecosystem?

• They produce energy from sunlight

• They provide shelter for small animals

• They break down dead matter to release nutrients

• They consume living plants

Which of the following organisms is known for breaking down dead organisms and droppings?

• Herbivores

• Omnivores

• Carnivores

• Decomposers

What is a unique feature of the Venus flytrap?

• It makes its own food using sunlight

• It gets energy from the meat of insects

• It traps insects to obtain nutrients

• It is a type of carnivorous animal

Why are scavengers sometimes grouped with decomposers?

• They hunt live prey

• They are plant-like organisms

• They produce their own food

• They consume dead animals

What is the primary source of energy for all living organisms?

• The Sun

• The Moon

• The Ocean

• The Earth

How do ecologists often find it challenging to group organisms?

• Because organisms are too small to see

• Because nature is too complex for simple groups

• Because all organisms are the same

• Because there are too few organisms to study