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Search Results for nitrogen - All Grades

423 questions match "nitrogen". Refine Your Search

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Grade 9 Botany
In the nitrogen cycle, how is nitrogen is fixed?
  1. nitrogen-fixing bacteria
  2. lightning
  3. a only
  4. a and b
  5. none of the above
Grade 7 Microbiology
Grade 7 Botany
What organisms are involved in nitrogen fixation?
  1. bacteria in soil
  2. some types of plants
  3. parasites in soil
  4. autotrophs
Grade 7 Food Chains and Webs
What is the role of decomposers in the nitrogen cycle?
  1. They release nitrogen gas into the atmosphere
  2. They release nitrogen during cellular respiration
  3. They use ammonia when they break down dead organisms
  4. They release nitrogen into the soil when they break down dead organisms
Grade 7 Microbiology
Which process do some bacteria use to convert nitrogen gas in the air to ammonia?
  1. decomposition
  2. excretion
  3. denitrification
  4. nitrogen fixation
Grade 7 Botany
Which process converts nitrogen into ammonia?
  1. denitrification
  2. nitrogen fixation
  3. nitrogen conversion
  4. ammonia synthesis
Grade 7 Botany
Before plants can use the ammonia, it must be changed into which form(s)?
  1. nitrogen gas and nitrates
  2. nitrogen gas and nitrites
  3. nitrates and nitrities
  4. amino acids and nitrogen gas
Grade 7 Atmosphere
How does nitrogen get recycled back to the atmosphere?
  1. bacteria in soil
  2. infiltration of groundwater
  3. runoff of precipitation
  4. lightning in storm clouds
College Properties of Matter
Which of the following can react with oxygen gas to form nitrogen dioxide in the air?
  1. nitrogen dioxide
  2. nitrogen trioxide
  3. nitrogen monoxide
  4. nitrogen
Grade 9 Periodic Table and Elements
Grade 9 Environmental Science
Nitrogen is not a greenhouse gas. This is because nitrogen
  1. absorbs UV radiation
  2. breaks down UV radiation
  3. scatters UV radiation
Grade 5 Microbiology
College Properties of Matter
Which of the following is emitted by exhaust from cars?
  1. Lead
  2. Mercury
  3. Nitrogen Oxides
  4. Nitrogen
Grade 11 Biogeochemical Cycles
What is the role of nitrogen fixing bacteria in the nitrogen cycle?
  1. They create acid rain.
  2. They cause algal blooms.
  3. They make nitrogen into a more useful form.
  4. They move water through the environment.
Grade 10 Periodic Table and Elements
Which ion of nitrogen is the largest?
  1. [math]N^{5+}[/math]
  2. [math]N^{3-}[/math]
  3. [math]N^{2-}[/math]
  4. [math]N^{3+}[/math]
  5. N
Grade 11 Macromolecules
Which of the following is not a nitrogenous base?
  1. cytosine
  2. thymine
  3. adanine
  4. threosine
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