Lesson Worksheet: The Importance of Nitrogen Science

In this worksheet, we will practice identifying the proportion of nitrogen gas in the atmosphere and identifying and describing the properties and uses of nitrogen gas.


True or False: Nitrogen is an essential component of proteins.

  • AFalse
  • BTrue


In what state of matter does nitrogen exist in the atmosphere?

  • ASolid state
  • BGaseous state
  • CLiquid state


Fill in the blanks: A molecule of nitrogen is composed of nitrogen atoms. We represent a nitrogen molecule as .

  • Atwo, N3
  • Bthree, N3
  • Ctwo, N2
  • Dthree, N2


True or False: The major source of nitrogen gas is the atmosphere.

  • AFalse
  • BTrue


Fill in the blank: When lightning strikes, nitrogen can react with to form nitrogen oxides that eventually reach the soil in a form that can be used by plants.

  • Ahydrogen
  • Bcarbon
  • Coxygen


True or False: Gaseous nitrogen is important to legumes like clover and peas that make proteins from atmospheric nitrogen.

  • ATrue
  • BFalse


Which of A, B, and C shows a molecule of nitrogen?

  • AB
  • BC
  • CA


Isabella and Ethan are talking about nitrogen gas in the atmosphere. Who is correct?

  • AEthan
  • BIsabella
  • CBoth


Like oxygen, nitrogen is essential for living things to survive on Earth.

Why do animals and plants need nitrogen?

  • ATo use it in photosynthesis
  • BTo breathe
  • CTo digest food
  • DTo build protein


Fill in the blank: needed to make proteins that are important for the growth of all living things.

  • ANitrogen is
  • BLightning is
  • CThe atmosphere is
  • DLegumes are
  • EBacteria are

This lesson includes 14 additional questions for subscribers.

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