Lesson 3: Matter Cycles

What is the main thing that carries out Nitrogen Fixation?

• Lightning

• Bacteria

• Plants

• Humans

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Which processes help to cycle carbon through ecosystems?

• cellular respiration and photosynthesis

• photosynthesis and transpiration

• transpiration and the calvin cycle

• calvin cycle and krebs cycle

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The release of water vapor from plants is called

• combustion

• transpiration

• evaporation

• condensation

The remains of ancient plants and animals that have been pressurized and buried for millions of years can be mined as

• limestone.

• calcium carbonate.

• wood.

• fossil fuels.

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Clouds are formed from

• precipitation and evaporation.

• evaporation and condensation.

• transpiration and evaporation.

• infiltration and condensation.

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The process where bacteria that convert nitrogen gas into ammonia and nitrites & nitrates compounds is called

• nitrogen fixation.

• denitrification.

• infiltration.

• nodule formation.

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water
• Atmosphere
• Sun
• Air

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What are the reactants in Photosynthesis?

• Sun, CO2, glucose

• glucose and oxygen

• sun, carbon dioxide, water

• water, glucose

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What is a product of photosynthesis AND a reactant for cellular respiration?

• oxygen

• water

• carbon dioxide

• Doctor Pepper

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