1 What is the role of producers in an ecosystem? A To eat other organisms B To produce their own food through photosynthesis C To break down dead organisms D To consume decomposers
2 Which of the following is an example of commensalism? A A tick feeding on a dog B A bee pollinating a flower C A barnacle attaching to a whale D A lion eating a zebra
3 Which of the following is an example of an aquatic ecosystem? A Desert B Grassland C Coral reef D Tundra
4 What is the definition of an ecosystem's carrying capacity? A The maximum number of organisms an environment can support B The number of predators in the ecosystem C The total biomass of producers D The amount of water available
5 Which of the following is an abiotic factor that limits population size? A Predation B Disease C Availability of water D Competition
6 What is the process by which plants convert sunlight into food? A Respiration B Photosynthesis C Digestion D Decomposition
7 What is the role of fungi in an ecosystem? A To produce oxygen B To act as decomposers C To hunt prey D To provide energy from sunlight
9 Which of the following is a way to conserve biodiversity? A Deforestation B Pollution C Creating protected areas D Overfishing
10 What is parasitism? A Both organisms benefit B One organism benefits and the other is harmed C One organism benefits and the other is unaffected D Both organisms are harmed
11 What is a food chain? A A network of all feeding relationships B A sequence showing how energy flows from one organism to another C A group of organisms that eat the same food D A system of decomposers
12 What is the difference between a food chain and a food web? A A food web is simpler than a food chain B A food chain is a single pathway, while a food web is multiple interconnected pathways C A food web only shows producers D A food chain includes decomposers
13 What is the term for organisms that eat both plants and animals? A Herbivores B Carnivores C Omnivores D Decomposers
14 What is an ecosystem? A A single organism living alone B A community of organisms interacting with each other and their environment C A group of only plants in an area D A place where only animals live
15 Which of the following is an abiotic component of an ecosystem? A Animals B Fungi C Temperature D Bacteria
16 Which of the following is a beneficial interaction in an ecosystem? A Predation B Competition C Mutualism D Parasitism
17 What is biodiversity? A The number of species in an ecosystem B The amount of water in an ecosystem C The size of an ecosystem D The temperature of an ecosystem
18 Which of the following is a biotic factor in a forest ecosystem? A Rocks B Water C Trees D Sunlight
19 What is a trophic level in an ecosystem? A The position an organism occupies in a food chain B The type of habitat an organism lives in C The size of an organism's population D The temperature of the ecosystem
20 What is the function of decomposers in an ecosystem? A To produce oxygen B To break down dead organisms and recycle nutrients C To hunt other animals D To create energy from sunlight
21 Which organisms are known as scavengers? A Animals that hunt live prey B Animals that feed on dead organisms C Plants that produce food D Fungi that decompose
22 Which of the following is a non-renewable resource? A Wind energy B Solar energy C Petroleum D Water
23 How does pollution affect an ecosystem? A It improves the health of organisms B It degrades the environment and can harm organisms C It increases biodiversity D It has no effect on organisms
24 What is a predator? A An organism that is eaten B An organism that hunts and eats other organisms C An organism that decomposes dead matter D An organism that produces food
25 What is the role of oxygen in an ecosystem? A To produce food B To support respiration in organisms C To decompose dead matter D To create soil