The Nitrogen Cycle Quiz

• Photosynthesis

• Nitrogen fixation

• Respiration

• Transpiration

Which of the following is a nitrogen compound commonly found in soil that plants absorb?

• Glucose

• Nitrate

• Oxygen

• Carbon dioxide

Tags

NGSS.MS-LS2-3

Which human activity most directly increases the amount of nitrogen compounds in the environment?

• Planting trees

• Using chemical fertilizers

• Building roads

• Burning coal

What is the main role of bacteria in the nitrogen cycle?

• Producing acid rain

• Converting nitrogen gas into compounds plants can use

• Absorbing sunlight for energy

• Breaking down rocks

Tags

NGSS.MS-LS2-3

Which of the following best describes an amino acid?

• A type of nitrogen compound used to build proteins

• A gas found in the atmosphere

• A mineral in rocks

• A type of acid found in rainwater

Tags

NGSS.HS-LS1-6

How does acid rain affect the nitrogen cycle in soil?

• It increases nitrogen fixation by bacteria

• It can wash away nitrogen compounds from the soil

• It adds more nitrogen to the soil

• It has no effect on nitrogen compounds

Tags

NGSS.MS-LS2-3

Which of the following is NOT a nitrogen compound?

What is the main source of nitrogen for plants?

• Nitrogen gas from the air

• Nitrogen compounds in the soil

• Carbon dioxide from the air

• Water from rainfall

Tags

NGSS.MS-LS2-1

Which process in the nitrogen cycle returns nitrogen to the atmosphere?

• Nitrogen fixation

• Denitrification

• Nitrification

• Assimilation

Which of the following best explains why nitrogen is important for living things?

• It is used to make carbohydrates

• It is a key part of amino acids and proteins

• It is the main source of energy

• It helps plants absorb sunlight