In what process do bacteria and fungi break down a dead organism's tissues and use some of the carbon as food?

Which of the following does NOT produce carbon dioxide? people burning fuels plants using sunlight people breathing animals breathing

process of releasing energy from food

Ammonia is a usable form of _______ that bacteria use in the ______ cycle.

Plants make protiens from

cycle in which a gas in the air is fixed into a form that plants can use

Which of the following is not a part of a natural cycle? Water evaporates into water vapor and condenses as clouds. Natural gas burns to produce energy, carbon dioxide, and water. Carbon dioxide is used in photosynthesis.

During ______, plants use sunlight, water, and carbon dioxide to make their own food.

provides energy for plants to grow

Cold air causes water vapor to _____ and form ______.

Which of the following describes a part of the nitrogen cycle? Plants use nitrogen gas and return it to the soil. Lightning turns fixed nitrogen into nitrogen gas. Bacteria in the soil fix nitrogen for plants.

Petroleum is made from