Cycles of Matter

What is the overall purpose of photosynthesis?

• To use energy from the sun to produce food for the plant
• To use energy from the sun to produce oxygen for animals to breathe
• To break down food in order to produce energy (ATP)
• To break down food in order to produce carbon dioxide

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What is A?

• Evaporation
• Condensation
• Precipitation
• Runoff

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NGSS.MS-ESS2-4

What is B?

• Evaporation
• Condensation
• Precipitation
• Runoff

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The continuous process by which water moves from Earth's surface to the atmosphere and back

• Nitrogen Cycle
• Carbon Oxygen Cycle
• WaterCycle
• Nitrogen Fixation

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Photosynthesis

• absorbs CO2
• releases CO2

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How animals get the nitrogen they need

• from the air they breathe
• from the water they drink
• from the food they eat
• from the Sun

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Organism that breaks down dead plants & animals and releases nitrogen back into atmosphere

• bacteria
• plants
• animals
• producers

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When nitrogen gas is turned in to a form that plants and animals can use is called 

• Combustion
• Photosynthesis
• Decomposition
• Nitrogen Fixation

How does phosphorus travel through an ecosystem?

• From the soil to producers and then from producers to consumers.

• From the air directly into consumers and then from consumers to producers.

• Phosphorus cannot travel through an ecosystem.

• From the soil to producers and that is as far as phosphorus may travel.

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What step of the water cycle is when plants gives off water vapor from photosynthesis?

• evaporation
• transpiration
• sublimation 
• condensation

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