Matter and Energy in Organisms

Which of the following best describes a producer in an ecosystem?

• An organism that eats other organisms
• An organism that breaks down dead matter
• An organism that makes its own food using sunlight

What is the term for a living component of an ecosystem?

• Abiotic factor
• Biotic factor
• Energy flow
• Nutrient cycle

Which of the following is an example of an abiotic factor in an ecosystem?

• Bacteria
• Sunlight
• Trees
• Rabbits

What is the role of a decomposer in an ecosystem?

• To produce food from sunlight
• To eat other organisms
• To break down dead organisms and waste
• To regulate the population of other species

Which of the following best describes a community in an ecosystem?

• All the living things in an area
• All the plants in an area
• All the members of one species in an area
• All the different species living and interacting in an area

What is the term for all the members of one species living in a particular area?

• Community
• Ecosystem
• Population
• Biome

Which of the following is an example of a consumer in an ecosystem?

• Grass
• Sun
• Deer
• Soil

What is the primary source of energy in most ecosystems?

• Water
• Soil
• Wind
• Sun

Which of the following best describes matter in an ecosystem?

• It is created by producers
• It is constantly recycled
• It disappears after being used
• It only moves in one direction

What term describes a group of organisms that can reproduce with one another?

• Population
• Community
• Ecosystem
• Species