Understanding Ecosystems

A park has trees, birds, soil, and a pond. Which statement BEST describes this park?

• It is only a community.

• It is an ecosystem.

• It is only a habitat.

• It is only a population.

Which of the following situations shows the concept of an ecosystem?

• A farmer waters his crops.

• A rabbit eats grass in a meadow with sunlight and water.

• A lion hunts in the zoo.

• A cat sleeps in a house.

A fish swimming in a pond needs oxygen from water. This shows interaction between:

• Biotic and abiotic factors

• Abiotic and abiotic factors

• Biotic and biotic factors

• None of the above

Which is the BEST example of a biotic factor affecting another biotic factor?

• Sunlight helps plants grow

• A snake eats a frog

• Water makes the soil wet

• Rocks block sunlight

If sunlight is removed from an ecosystem, what would MOST LIKELY happen first?

• Producers cannot make food

• Consumers cannot eat meat

• Decomposers multiply faster

• Soil becomes richer

Which group correctly shows only abiotic factors?

• Water, air, soil

• Grass, frog, snake

• Bacteria, fungi, mushroom

• Rabbit, cow, deer

If decomposers disappeared, what would be the MOST immediate effect?

• Plants will grow taller

• Dead organisms will pile up

• Herbivores will increase

• Sunlight will decrease

Which pair shows the correct interaction between biotic and abiotic components?

• Rain falling on soil

• Frog breathing air

• Snake eating frog

• Rocks breaking down

Which of the following organisms is correctly matched with its role?

• Grass – producer

• Eagle – producer

• Cow – decomposer

• Bacteria – consumer

A hawk eats a snake that eats a frog. What is the hawk’s role in this food chain?

• Producer

• Secondary consumer

• Tertiary consumer

• Decomposer