What is the name for organisms such as maggots and worms that feed on dead matter? PredatorsConsumersProducersDetritivores2Why are nitrates important in living organisms? For fertilisationTo aid the process of decayTo make proteinsFor photosynthesis3One of the stages of the water cycle is percolation. What is this?Trickling of water through gaps in soils and rocksLoss of water vapour from plantsLoss of water from cloudsWarming of water on the Earth’s surface by the sun4Which of the following is the correct order for four key stages of the water cycle? Percolation, condensation, precipitation, evaporationEvaporation, condensation, precipitation, percolationEvaporation, precipitation, percolation, condensationPercolation, precipitation, condensation, evaporation5Which of the following processes that return carbon to the atmosphere is not a natural activity?DecompositionDecayCombustionRespiration6Which of the following remove carbon dioxide from the atmosphere?PlantsDecomposersDetritivoresAnimals

Organisms that eat dead and decaying plants and animals*1 pointare decomposershelp keep the Earth clean from waste piling upreturn nutrients from dead organic matter to the soilall of the above

Organisms that feed on dead organisms for nutrients are called: A. saprobes. B. parasites. C. autotrophs. D. lithoautotrophs. E. phototrophs.

Which of the following is not an abiotic factor that influences the distribution of organisms?Availability of foodWaterAtmospheric gasesTemperature2Which of the following is an ‘indicator species’ of oxygenated water?Mayfly larvaeLichenRed-tailed maggotSludgeworms3Why does the bright red colour of sludgeworms mean they can thrive in water containing low levels of oxygen?It attracts matesIt warns off predatorsIt indicates a high concentration of haemoglobinIt provides camouflage4Lichens are plant-like organisms that grow in exposed places such as rocks or tree bark. If few or no lichens are growing in a specific area, what might this indicate? The air is pollutedA new pathogen has been introducedA new predator has been introducedThe air is clean

What is the name of stable organic matter?Group of answer choicesLiving organismsEarthwormsHumusFresh residueNext

Worms break down dead plants in the soil to release nutrients. Which property of nutrients shows that they are matter? A. Nutrients are warm. B. Nutrients have mass. C. Nutrients can do work. D. Nutrients contain energy.