1 What is the main source of energy for green plants? A Soil nutrients B Sunlight C Water D Carbon dioxide
3 What is the primary role of producers in a food web? A To decompose dead organisms B To convert sunlight into energy C To consume other organisms D To recycle nutrients
4 What is a food chain? A A series of organisms each depending on the next as food B A diagram showing how nutrients are recycled C A competition between species for food D A group of animals living in the same area
6 What is the term for animals that are eaten by predators? A Prey B Predators C Scavengers D Decomposers
7 What is the term for the path that energy takes through an ecosystem? A Energy cycle B Food chain C Food web D Energy flow
8 What is the main characteristic of a primary consumer? A It eats producers B It eats other consumers C It decomposes organic matter D It produces its own food
9 What is the main difference between a food chain and a food web? A Food chains are made of plants only B Food webs show multiple overlapping food chains C Food webs do not include decomposers D Food chains include only predators
13 Which organism is at the top of a food chain? A Producer B Primary consumer C Secondary consumer D Apex predator
16 Which of the following is an example of a food chain? A Grass → Deer → Lion B Sun → Water → Soil C Bird → Tree → Insect D Snake → Frog → Insect
18 What is the main difference between a food chain and a food web? A Food chains show only predators B Food webs are more complex and show many feeding relationships C Food chains include decomposers D Food webs do not include producers
19 In a food chain, the arrows represent: A The direction of energy flow B The direction of movement of animals C The growth of organisms D The recycling of matter
21 What is a herbivore? A An animal that eats only plants B An animal that eats only animals C An animal that eats both plants and animals D An animal that breaks down dead matter
22 Why are decomposers important in an ecosystem? A They produce food for all organisms B They recycle nutrients back into the soil C They provide oxygen for animals D They control the population of predators
23 What is a trophic level? A The number of organisms in a habitat B The position of an organism in the food chain C The amount of energy in an ecosystem D The competition between species
24 Which of the following correctly describes a food web? A A single linear sequence of organisms eating each other B Multiple interconnected food chains C A cycle of nutrients in the environment D The flow of energy from the sun
25 Which of the following is an example of a food web? A Grass → Rabbit → Fox B Grass → Rabbit → Fox; Grass → Mouse → Fox; Grass → Mouse → Snake → Hawk C Sun → Grass → Rabbit D Rabbit → Fox → Eagle