Biogeochemical Cycles TEST

Nutrients cycle through an ecosystem in ____________.

• Water cycles
• Energy pyramids
• Food chains
• Biogeochemical cycles

Which of the following steps of the water cycle involves water changing from a liguid to a gas?

• Runoff
• Condensation
• Evaporation
• Precipitation

During ________, plants lose water through openings n their leaves.

• Condensation
• Transpiration
• Evaporation
• Precipitation

Which of the following correctly traces the flow of carbon through an ecosystem?

• Carbon is taken from the atmosphere by producers, then it is put back into the atmosphere by consumers
• Carbon is taken from the atmosphere by consumers, then it is put back into the atmosphere by producers
• Carbon is taken from the atmosphere by producers and consumers, then it is put back into the atmosphere by producers and consumers
• Carbon is taken from the atmosphere by bacteria, then it is put back into the atmosphere by bacteria

Which of the following correctly explains how nitrogen is recycled through an ecosystem?

• Nitrogen is taken from the atmosphere by producers, then it is put back into the atmosphere by consumers
• Nitrogen is taken from the atmosphere by consumers, then it is put back into the atmosphere by producers
• Nitrogen is taken from the atmosphere by producers and consumers, then it is put back into the atmosphere by producers and consumers
• Nitrogen is taken from the atmosphere by bacteria, then it is put back into the atmosphere by bacteria

Which of the following is the only nutrient that does not cycle into the atmosphere?

• Water
• Carbon
• Nitrogen
• Phosphorus

During the process of photosynthesis, plants take in ____ gas and release _____.

• CO2 , O2
• CO2, CO2
• O2, O2
• O2, CO2

What is the goal of cellular respiration?

• To produce food
• To turn food into energy
• To produce oxygen
• To take in sunlight

During the day, plants do _____________ and at night plants do ____________.

• Photosynthesis, respiration
• Respiration, photosynthesis
• Both photosynthesis and respiration, respiration
• Photosynthesis, Both photosynthesis and respiration

Even though there is a carbon cycle, atmospheric carbon dioxide levels are rising. Which of the following best explains why this is true?

• Animals give off carbon dioxide during respiration
• The burning of fossil fuels by humans release large amounts of carbon dioxide
• More carbon dioxide is being given off by the ocean waters as they heat up
• The destruction of coral reefs leads to an increase of carbon dioxide being given off