1. Which of the following is NOT basic requirement of an ecosystem? A. Source of energy. B. A way to store energy. C. Pollutants. D. Essential Nutrient
2. Which of the following lists has ONLY abiotic factors? A. Sunlight, algae, pH, temperature. B. Algae, dissolved oxygen, nitrate concentration, pH. C. Dissolved oxygen, algae, guppy, crab. D. Sunlight, temperature, conductivity, dissolved oxygen.
3. The following are biotic components of an ecosystem EXCEPT ___________. A. Water. B. Fish. C. Algae. D. Lichens.
4. Which of the following factors in an ecosystem is biotic? A. Insects. B. Soil. C. Water. D. Sunlight.
5. Rabbits eat grass and other plants to survive, but they do not eat animals. What kind of animal are rabbits? A. Decomposers. B. Carnivores. C. Producers. D. Herbivores.
6. How do decomposers help other organisms in an ecosystem? A. They break down dead organisms and add nutrients back to the soil that plants use. B. They use the sunlight to make their own food that other organisms eat for energy. C. They help disperse seeds for plant growth. D. Decomposers do not help other organisms in an ecosystem.
7. Given the following organisms: Corn, Snake, Bird, and Bacteria, which is well constructed food chain? A. Corn → Bird → Snake → Bacteria. B. Bird → Corn → Bacteria → Snake. C. Corn → Bacteria → Snake → Bird. D. Bacteria → Snake → Bird → Corn.
