nitrogen
Nitrogen is element 7. This topic is part of Chemistry within Science & Nature. This page currently draws on 42 supporting questions, with answers and bonus facts available below.
nitrogen trivia questions
What is the chemical symbol for nitrogen?
Answer: N
Bonus fact: Nitrogen is element 7.
About what percentage of Earth's atmosphere is nitrogen?
Answer: 78%
Bonus fact: Nitrogen is the most abundant gas in Earth's atmosphere.
Commercial ammonia is produced mainly from nitrogen and hydrogen using which industrial process?
Answer: Haber-Bosch process
Bonus fact: The Haber-Bosch process made large-scale synthetic fertilizer production possible.
What term describes the nitrogen-processing startup period needed to establish beneficial bacteria in a new aquarium?
Answer: Cycling
Bonus fact: Aquarium cycling establishes colonies of bacteria that convert ammonia and nitrite into less toxic nitrate.
Clover belongs to which plant family, known for many species that can host nitrogen-fixing bacteria?
Answer: Legume family
Bonus fact: Clovers are legumes and often form symbiotic relationships with nitrogen-fixing bacteria in root nodules.
What bacteria commonly live in root nodules of legumes and help fix nitrogen?
Answer: Rhizobium
Bonus fact: Rhizobium bacteria form symbiotic relationships with many legumes.
The letters N-P-K on fertilizer stand for nitrogen, phosphorus, and what?
Answer: Potassium
Bonus fact: N-P-K labels indicate the three primary macronutrients.
Excess nitrogen and phosphorus can trigger algae blooms through what process?
Answer: Eutrophication
Bonus fact: Nutrient enrichment fuels rapid algal growth.
The nitrogen cycle moves what element through ecosystems?
Answer: Nitrogen
Bonus fact: Nitrogen moves among atmosphere, soil, organisms, and water.
What process converts atmospheric nitrogen gas into forms organisms can use?
Answer: Nitrogen fixation
Bonus fact: Certain bacteria and lightning can fix nitrogen.
What process returns nitrogen gas to the atmosphere?
Answer: Denitrification
Bonus fact: Denitrifying bacteria convert nitrates to nitrogen gas.
Unlike the carbon and nitrogen cycles, the phosphorus cycle has little major involvement with what reservoir?
Answer: Atmosphere
Bonus fact: Phosphorus cycles mainly through rocks, soil, water, and organisms.