Carbon & Nitrogen Cycles

Carbon & Nitrogen Cycles

Multiple Choice

What process captures CO₂ from the atmosphere?

• Photosynthesis

• Respiration

• Fossilization

• Combustion

Multiple Choice

TRUE or FALSE: Only animals release carbon dioxide by respiration.

• TRUE

• FALSE

Multiple Choice

How do animals get carbon into their bodies to build their cells?

• From the atmosphere

• From fossil fuels

• It just appears if we try hard enough

• By eating plants and/or other animals

Multiple Choice

The form nitrogen takes in the atmosphere:

• N₂

• NO₃^-

• NH₄⁺

• NO₂^-

Fill in the Blank

This organism is important for fixing nitrogen so plants can use it:

Multiple Choice

Nitrogen is an important ingredient for building WHAT in cells?

• carbohydrates

• fats (lipids)

• proteins

• cholesterol