Which process removes carbon dioxide from the atmosphere?
Combustion
Respiration
Photosynthesis
Which conditions make decay happen at a faster rate?
Warm and dry
Cold and moist
Warm and moist
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 of these substances contain nitrogen?
Proteins
Carbohydrates
Fats
Which process releases water vapour into the atmosphere?
Transpiration
Condensation
Precipitation
Which of these are decomposers?
Plants and viruses
Fungi and bacteria
Animals and plants
Which gas is needed for decomposers to respire?
Carbon dioxide
Hydrogen
Oxygen
What is potable water?
Unsafe to drink
Safe to drink
Unsafe to transport
Which of these species would be found in a polluted river? - Higher
Stonefly larva
Lichen
Blood worm