Cycles of Nutrients

The three main cycles studied in this unit were:

• Oxygen, Carbon, Nitrogen

• Helium, Hydrogen, Oxygen

• Gold, Silver, Carbon

• Hydrogen, Calcium, Boron

How does carbon get into us humans?

• We breath (inhale) carbon into our bodies.

• We drink carbon into our bodies.

• We consume (eat) carbon into our bodies.

• We make carbon in our bodies during photosynthesis.

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Carbon goes into plants as:

• Oxygen

• Carbon Dioxide (CO2)

• Glucose (C6H12O6)

• Nitrogen

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What is the main way we get oxygen into our bodies?

• We consume (eat) it.

• We breath it.

• We drink it.

• Our body makes oxygen during cellular respiration.

When animals and plants die, and get pushed under the soil for millions of years, they can create something that we use for combustion. What is that?

• skeletons

• water

• tar

• fossil fuels

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When an element moves from one reservoir to another, and eventually back to that beginning reservoir, what do we call that?

• a cycle

• greenhouse gasses

• atmosphere

• nitrification

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What are two ways carbon dioxide (CO2) get into our atmosphere?

• combustion, and animals breath it out

• it naturally comes out of soil and water

• plants make it during photosynthesis, and it is made in by greenhouse gasses

• humans breath it IN, and plants breath it OUT

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An example of combustion is:

• campfire

• melting ice

• chewing food

• All of the above

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A reservoir can be a place where something is stored or saved. What is a typical reservoir of carbon?

• Trees

• Atmosphere

• Animals

• All of the above

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What is the most abundant element in the earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon dioxide

• Water