nat 4 test Flashcards
why do animas need the nitrogen cycle
Animals and plants need nitrogen to build amino acids in proteins, which are the building blocks of life
what are the disadvantages of fertilisers
They are expensive.
The ingredients in the fertilisers are toxic
too much fertiliser can damage plants
Which process removes carbon dioxide from the atmosphere?
Photosynthesis
which process releases carbon dioxide to the atmosphere?
Decomposition
Which substances contain carbon?
Proteins and fats
Which conditions are best for decomposition to happen quickly?
Warm, moist conditions
What do nitrogen-fixing bacteria do?
They convert nitrogen gas into nitrate ions
What do nitrifying bacteria do?
They convert ammonium ions into nitrate ions
Which substances contain nitrogen?
Proteins
About what percentage of the air is nitrogen?
78%
Which process releases water vapour to the atmosphere?
Transpiration
Which process removes water vapour from the atmosphere?
Condensation
natural alternative for fertiliser
cow manure
