Materials on Earth cycle between living organisms and the environment. Microorganisms are vital for these cycles. They break down dead matter and release the materials back to the environment.
Which of these is a biotic component of an ecosystem?
Amount of sunlight
Number of plants
Which of these processes is NOT part of the carbon cycle?
Which process occurs when water is absorbed into the ground?
Which process releases water vapour into the atmosphere?
Which of these is the correct order of events for the water cycle when water from the ocean forms clouds?
Evaporation, cooling, condensation
Cooling, evaporation, condensation
Condensation, evaporation, cooling
Which of these substances contain nitrogen?
What do nitrogen-fixing bacteria do?
They convert nitrates into nitrogen gas
They convert ammonia into nitrates
They convert nitrogen gas into nitrates
What do nitrifying bacteria do?
Which process removes carbon dioxide from the atmosphere?
Which of these species are NOT decomposers?