LIVING THINGS AND THE ENVIRONMENT

Which of the following best describes an ecosystem?

• A group of animals living together

• The interaction between living things and their environment

• A forest or a lake

• The weather in a specific area

What is the term for an organism that makes its own food using sunlight?

• Consumer

• Decomposer

• Producer

• Predator

In a food chain, energy flows:

• From consumers to producers

• From decomposers to producers

• From producers to consumers

• Equally in all directions

Which of these is an example of a symbiotic relationship?

• A lion hunting a zebra

• A bird eating berries from a bush

• A clownfish living in an sea anemone

• A butterfly drinking nectar from a flower

What is the main role of decomposers in an ecosystem?

• To produce oxygen

• To hunt other animals

• To break down dead organisms and recycle nutrients

• To control the population of other species

Which of the following is NOT a biotic factor in an ecosystem?

• Bacteria

• Sunlight

• Plants

• Animals

What term describes all the populations of different species living in the same area?

• Habitat

• Ecosystem

• Community

• Biome

Which of these human activities is LEAST likely to cause harm to an ecosystem?

• Deforestation

• Pollution

• Bird watching

• Overfishing

What is the process by which plants convert sunlight into energy?

• Respiration

• Photosynthesis

• Decomposition

• Fermentation

In an ecosystem, what is the typical ratio of producers to consumers?

• More producers than consumers

• More consumers than producers

• Equal numbers of producers and consumers

• It varies depending on the specific ecosystem