Cycles of Nature

plants release _____ into the atmosphere as a byproduct of photosynthesis

cycle in which water moves through the environment

water vapor turning into water

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.

Burning fuels in cars and factories upsets the balance of what cycle?

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

Plants and animals release _________ as a product of respiration.

Water falls to Earth as rain after water vapor ______ into clouds.

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.

Chemicals and pesticides get into groundwater supplies through ______

Cold air causes water vapor to _____ and form ______.

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

Petroleum is made from

Which of the following return tot eh soil in animal waste? nitrates and oxygen ammonia and oxygen ammonia and nitrates oxygen and bacteria

provides energy for plants to grow

water falling from clouds

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

process of releasing energy from food

Plants return water to the environment through _____

water turning into water vapor

Cycle in which plants turn gas in air into oxygen

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

plants losing water through their stomata