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Cycles of Nature
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Ammonia is a usable form of _______ that bacteria use in the ______ cycle.
nitrogen; nitrogen cycle
Cold air causes water vapor to _____ and form ______.
condense; 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.
Natural gas burns to produce energy, carbon dioxide, and 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.
Bacteria in the soil fix nitrogen for plants.
Plants return water to the environment through _____
transpiration
Chemicals and pesticides get into groundwater supplies through ______
rain
Water falls to Earth as rain after water vapor ______ into clouds.
condenses
Burning fuels in cars and factories upsets the balance of what cycle?
Carbon-oxygen cycle
Petroleum is made from
decayed organisms
In what process do bacteria and fungi break down a dead organism's tissues and use some of the carbon as food?
decay
Plants make protiens from
nitrates in the soil
Which of the following return tot eh soil in animal waste? nitrates and oxygen ammonia and oxygen ammonia and nitrates oxygen and bacteria
ammonia and nitrates
Which of the following does NOT produce carbon dioxide? people burning fuels plants using sunlight people breathing animals breathing
plants using sunlight
During ______, plants use sunlight, water, and carbon dioxide to make their own food.
photosynthesis
Plants and animals release _________ as a product of respiration.
carbon dioxide
plants release _____ into the atmosphere as a byproduct of photosynthesis
oxgen
provides energy for plants to grow
sunlight
process of releasing energy from food
respiration
cycle in which water moves through the environment
water cycle
plants losing water through their stomata
transpiration
water vapor turning into water
condensation
cycle in which a gas in the air is fixed into a form that plants can use
nitrogen cycle
water turning into water vapor
evaporation
water falling from clouds
precipitation
Cycle in which plants turn gas in air into oxygen
carbon-oxygen cycle
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