Nitrogen Cycle

Nitrogen Cycle

By Rosemarie Espino

Nitrogen Cycle

​Read this to answer question that follows!

Multiple Choice

True or False: Organisms need proteins to stay alive.

• True

• False

​Open your book to page 53 and draw the arrows in the right spot in your book.

Multiple Choice

The atmosphere is mostly made of:

• Nitrogen

• Ozone and methane
• Hydrogen and helium
• Carbon dioxide and argon

​Read this (also on page 53) to help answer the questions that follow.

Multiple Choice

What is the process that changes atmospheric nitrogen into nitrogen compounds that are useable by living things?

• Nitrogen fixation
• Nitrogen decomposition
• Nitrogen evaporation
• Nitrogen absorption

Multiple Choice

Why do farmers spread manure, animal waste, on their fields?

• To attract pests to the crops
• To create a foul smell in the fields
• To reduce soil moisture
• To help the plants grow more.

Type text here...

​Fill in your Cycle as you move along

Nitrogen Fixation

​Nitrogen Fixation - Changing atmospheric nitrogen into nitrogen that is usable by living things.

​Key Processes:

Nitrogen Fixation

Nitrification

​Nitrification -
The process of turning ammonium into nitrates

​Key Processes:

Multiple Choice

What is nitrification?

• Nitrification is the process of converting ammonia into nitrates.

• The transformation of nitrites into oxygen.
• A method of removing nitrogen from the soil.
• The process of converting nitrates into ammonia.

Nitrogen Fixation

Ammonification

Nitrification

​Ammonification
Decomposers turn nitrogen compounds from dead organsims into ammonium

​Key Processes:

Multiple Choice

What is ammonification?

• Ammonification is the process of converting ammonia into organic nitrogen.
• Ammonification is the synthesis of organic nitrogen from inorganic sources.
• Ammonification is the breakdown of ammonia into nitrogen gas by plants.
• Ammonification is the conversion of nitrogen compounds from dead organisms into ammonium

Nitrogen Fixation

Assimilation

Ammonification

Nitrification

​Assimilation -
Plants absorb the nitrates

​Key Processes:

Multiple Choice

What is assimilation in plants?

• The absorption of water through roots.
• The release of oxygen during respiration.
• Plants absorbing nitrates

• The process of photosynthesis in plants.

Nitrogen Fixation

Assimilation

Ammonification

Nitrification

​Denitrification-
Process turning nitrates into nitrogen gas.

​Key Processes:

Denitrification

Multiple Choice

What is denitrification?

• The process of converting nitrates into nitrogen gas.

• The process of converting nitrogen gas into nitrates.
• The transformation of ammonia into nitrites and nitrates.
• A method of increasing soil nitrogen levels through fertilizers.

Labelling

Label the Nitrogen Cycle

Drag labels to their correct position on the image

Denitrification

Nitrogen Fixation

Nitrification

Assimilation

Ammonification

Nitrogen in the atmosphere

Feeding