1) 1. What Are Decomposers? a) Organisms that break down dead and waste matter into simple substances b) Organisms that make their own food using sunlight c) Organisms that only eat other living organisms d) Rocks that slowly release minerals into the soil 2) Which of the Following Are Important Groups of Decomposers? a) Plants and algae b) Worms and beetles c) Lions and eagles d) Bacteria and fungi 3) The Process of Breaking Down Dead and Waste Matter is Called What? a) Respiration b) Decomposition c) Filtration d) Photosynthesis 4) Decomposers Absorb What? a) All the nutrients from what they break down b) Only oxygen from the matter c) Only a small amount of nutrients, releasing the rest into the environment d) Nothing, they just dry out dead matter 5) During Aerobic Respiration, Decomposers Do What? a) Take in oxygen and release carbon dioxide b) Take in carbon dioxide and release oxygen c) Produce light energy d) Absorb water and release minerals 6) How Does Composting Work a) Decomposers break down organic waste into natural fertiliser b) Worms turn sand into soil c) Sunlight turns leaves into fertiliser d) Rainwater washes away dead matter 7) Why Must Compost Be Turned or Aerated? a) To make it smell better b) To add oxygen for aerobic decomposition c) To keep insects away d) To dry it out faster 8) What Happens When a Predator Dies? a) Decomposers freeze the body for later b) The body disappears instantly c) Decomposers and scavengers break down its tissues into nutrients d) Plants eat the remains directly 9) What Would Happen if There Were No Decomposers? a) Nutrients would recycle faster b) Dead matter would pile up and plants couldn’t get nutrients c) Plants would grow faster d) Soil would become richer 10) How Do Decomposers Help Recycle Nutrients in the Ecosystem? a) They break down dead matter and return nutrients to the soil for plants to reuse. b) By producing food through photosynthesis c) By eating other consumers for energy d) By storing nutrients inside rocks 11) Fill in the Missing Word - Producers, Consumers, and Decomposers _______ on One Another for Survival. a) Compete b) Fight c) Depend d) Ignore 12) After a tree falls in a forest, mushrooms start growing on it. What are the mushrooms doing? a) Producing their own food using sunlight b) Eating insects that live on the tree c) Breaking down the dead wood for nutrients d) Turning the tree into new plants 13) In a compost bin, food scraps slowly turn into dark soil. What type of organism helps make this happen? a) Insects and worms b) Bacteria and fungi c) Plants d) Consumers such as birds 14) A fox eats a rabbit that has been eating grass. Which statement correctly describes this food chain? a) The fox is a producer b) The rabbit is a decomposer c) The rabbit is a secondary consumer d) The grass is a producer 15) When a whale dies and sinks to the ocean floor, bacteria and crabs feed on it. What role do they play? a) Producers b) Parasites c) Decomposers and scavengers d) Consumers 16) A farmer notices that earthworms help make the soil rich. Why is this important for the food chain? a) Aids in decompositioning b) Worms store food for other animals c) Worms eat harmful insects d) Plants use worms as food 17) In a rotting log, fungi and bacteria release nutrients back into the soil. Who benefits first from this process? a) Herbivores that eat plants b) Carnivores that eat other animals c) Scavengers that eat fungi d) Producers that absorb nutrients 18) A banana peel left outside disappears after a few weeks. What caused it to break down? a) Bacteria, fungi, and insects b) Oxygen and sunlight c) Rainwater washing it away d) Animals carrying it off

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