Energy and matter in ecosystems, cycling of matter in earths spheres
Quiz by Diego Moreno
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40 questions
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- Q1Which of the following best describes the process of nitrogen fixation in ecosystems?The absorption of nitrogen from the soil by plantsThe breakdown of organic matter into simpler substancesThe process of converting plant matter into energyThe conversion of atmospheric nitrogen into a usable form for plants30s
- Q2What is the main role of decomposers in an ecosystem?Regulating the population of herbivoresConsuming other organisms as their food sourceBreaking down dead organic matter and recycling nutrientsProducing energy through photosynthesis30s
- Q3Which of the following processes is primarily responsible for the movement of water within the Earth's spheres?The water cycleThe carbon cycleThe phosphorus cycleThe nitrogen cycle30s
- Q4In an ecosystem, what is the primary source of energy that fuels most food chains?The SunChemical energy from soilWind energyGeothermal energy30s
- Q5Which term describes the variety of life in a particular ecosystem?Energy flowEcosystem stabilityBiomassBiodiversity30s
- Q6What process enables plants to convert carbon dioxide and water into glucose and oxygen using sunlight?DecompositionPhotosynthesisTranspirationRespiration30s
- Q7Which of the following statements best describes the role of producers in an ecosystem?They break down dead organic matterThey convert solar energy into chemical energy through photosynthesisThey consume other organisms for energyThey regulate the population of herbivores30s
- Q8What happens to energy as it moves through an ecosystem from producers to higher trophic levels?It decreases due to energy loss at each trophic levelIt increases as it moves up the levelsIt remains constant throughoutIt is stored indefinitely at higher levels30s
- Q9Which process is responsible for the release of carbon dioxide into the atmosphere from living organisms?Nitrogen fixationPhotosynthesisTranspirationCellular respiration30s
- Q10What is the primary component of the Earth's atmosphere that is essential for life and is also a key player in the greenhouse effect?MethaneOxygenNitrogenCarbon dioxide30s
- Q11Which process is primarily responsible for the transfer of energy from the sun to producers in an ecosystem?PhotosynthesisDecompositionTranspirationRespiration30s
- Q12Which of the following best describes how carbon cycles through the Earth's spheres?Carbon is only found in the atmosphere.Carbon is exchanged among the atmosphere, hydrosphere, lithosphere, and biosphere through processes like photosynthesis and respiration.Carbon does not cycle through the biosphere.Carbon is fixed only in the lithosphere.30s
- Q13What role do decomposers play in the cycling of matter within ecosystems?Decomposers break down dead organic matter, returning nutrients to the soil and making them available for plants.Decomposers compete with producers for sunlight.Decomposers produce energy through photosynthesis.Decomposers store energy in their bodies for long-term use.30s
- Q14Which process is primarily responsible for the movement of water through the Earth's spheres in the water cycle?TranspirationCondensationPrecipitationEvaporation30s
- Q15In which form do plants primarily absorb nitrogen for use in biological processes?Nitrogen gasAmmoniaUreaNitrates30s