Biogeochemical Cycles Review

Humans and animals can use nitrogen directly from the atmosphere (N₂).

• True

• False

Tags

NGSS.MS-LS2-1

What is the chemical symbol for atmospheric nitrogen?

• NH₃

• NO₂

• N₂

• N₃

There is very little nitrogen in our breathable atmosphere.

• True

• False

Choose the best response to fill in the blanks:

Most animals inhale ____________ and exhale ______________.

• nitrogen, oxygen

• oxygen, carbon dioxide

• carbon dioxide, oxygen

• oxygen, nitrogen

Cellular respiration occurs in which organelle in plant and animal cells?

• Cytoplasm

• Cell membrane

• Mitochondria

• Nucleus

The amount of carbon in our atmosphere is maintaining a healthy level.

• True

• False

Tags

NGSS.HS-ESS2-6

NGSS.HS-ESS3-5

NGSS.HS-LS2-5

Animals can use NH₃ (ammonia) easily as it is a usable form of nitrogen for them.

• True

• False

How many protons does a stable, neutral nitrogen atom have?

• 14

• 5

• 7

• 6

Tags

NGSS.MS-PS1-1

Which is a way that nitrogen enters the atmosphere (choose all that apply)?

• Boiling water

• Decaying organic matter

• Bacteria

• Animal respiration

Carbon ONLY appears in living things.

• True

• False