Nutrient Cycles

Which elements are in fertilizer?

• Nitrogen and Oxygen
• Phosphorous and Hydrogen
• Nitrogen and Phosphorous

What is one way that people add Nitrogen into the environment?

• By littering
• By using fertilizer on farms
• By burning fossil fuels 

What is one way that people add Phosphorus into the environment?

• Manure from animals 
• Driving cars
• Cutting down trees (deforestation)

True or False: Plants are primary consumers of carbon dioxide.

• True
• False

True or False: Humans and animals release carbon dioxide into the air during photosynthesis and respiration.

• True
• False 

True or False: All of the carbon in existence is continually recycled in the carbon cycle.

• True
• False

Where does the carbon come from that plants use?

• Animals
• Water
• Air
• Connecticut

What of the following is NOT a way that people add carbon to the environment?

• Burning fossil fuels
• Deforestation
• Littering

What is one way that people add sulfur into the environment?

• Coal-fired power plants
• Driving cars
• Burning oil in our homes
• All of the above 

What is a negative effect of sulfur (especially sulfur dioxide) being released into the atmosphere?

• It creates acid rain
• It causes clouds to not form
• It makes the sky yellow