WorksheetsEcosystem and Nutrient Cycle Quiz
Total questions: 30
Worksheet time: 15mins
What is the primary source of energy for ecosystems?
Nutrients
Water
Sunlight
Soil
According to the law of conservation of mass, matter:
Can be created or destroyed
Is always recycled
Is only found in living organisms
Cannot be transformed
Which of the following is NOT a nutrient essential for life?
Carbon
Nitrogen
Argon
Phosphorus
What process breaks down large rocks into soil?
Erosion
Weathering
Photosynthesis
Transpiration
The exchange of matter through the biosphere is termed:
Biogeochemical cycle
Nutrient cycle
Energy cycle
Matter cycle
Where do plants primarily obtain nutrients?
From other plants
From the air, soil, or water
From animals
From decomposers
What is the process by which water vapor cools and forms clouds?
Evaporation
Transpiration
Condensation
Precipitation
What percentage of Earth's water is freshwater?
10%
25%
3%
50%
During photosynthesis, plants convert carbon dioxide and water into:
Oxygen
Proteins
Carbohydrates
Fats
What process releases carbon dioxide back into the atmosphere?
Photosynthesis
Cellular respiration
Nitrogen fixation
Weathering
Which cycle involves the transformation of nitrogen gas into usable forms for plants?
Carbon cycle
Water cycle
Nitrogen cycle
Phosphorus cycle
What is the primary role of decomposers in the ecosystem?
To produce energy
To consume plants
To recycle nutrients
To capture sunlight
Calcium carbonate is commonly found in:
Soil
Ocean sediments
Animal bones
All of the above
Which of the following is a long-term cycle in the phosphorus cycle?
Soil absorption
Erosion of rocks
Plant uptake
Decomposition
What is transpiration?
Water evaporating from soil
Water vapor released from plants
Water falling as rain
Water flowing in rivers
What process adds nitrogen compounds to the soil?
Photosynthesis
Nitrogen fixation
Respiration
Erosion
Which organism is primarily responsible for nitrogen fixation?
Decomposers
Leguminous plants
Bacteria
Fungi
What happens during denitrification?
Nitrogen is converted into ammonia
Nitrogen gas is released into the atmosphere
Nitrogen is absorbed by plants
Nitrogen is stored in fossil fuels
Which nutrient is often a limiting factor for plant growth?
Oxygen
Phosphorus
Hydrogen
Carbon
What percentage of freshwater is available for living organisms?
10%
31%
50%
69%
Which process is responsible for returning nutrients to the soil?
Photosynthesis
Erosion
Decomposition
Transpiration
What role do clouds play in the water cycle?
They absorb water
They release precipitation
They filter sunlight
They store nutrients
Which gas is a byproduct of cellular respiration?
Oxygen
Nitrogen
Carbon dioxide
Methane
What is a significant source of phosphorus in ecosystems?
Soil erosion
Ocean sediments
Atmospheric gases
Plant uptake
The majority of carbon on Earth is stored in:
The atmosphere
Oceans
Fossil fuels
Soil
What type of organisms are primary producers in ecosystems?
Herbivores
Carnivores
Plants
Decomposers
Which process involves the conversion of solar energy into chemical energy?
Respiration
Photosynthesis
Nitrogen fixation
Transpiration
Which of the following is NOT part of the water cycle?
Evaporation
Condensation
Absorption
Precipitation
What is the primary way carbon enters the atmosphere?
Photosynthesis
Respiration and combustion
Nitrogen fixation
Erosion
In the nitrogen cycle, what happens to nitrogen when organisms die?
It is lost to the atmosphere
It is stored in plants
It is converted by decomposers
It is transformed into carbon dioxide
