Essential Takeaways

• Water is a precious resource that we must conserve. 
• The carbon, nitrogen, and oxygen cycles are crucial for maintaining the balance of the ecosystem. 

Learning Objectives

• Understand water cycle and its importance 
• Explain the carbon and oxygen cycles 

• Understand the role of each cycle in maintaining the balance in our ecosystem 

Core ideas

• Cycles are repeated patterns of change in nature. 

• Understanding cycles helps us predict events and processes. 
• The water cycle is a vital cycle for life on Earth. 
• The water cycle describes the movement of water on, above, and below the Earth’s surface. 
• The water cycle involves evaporation, condensation, precipitation, and transpiration. 

Points to Remember

• The water cycle involves the continuous movement of water on, above, and below the earth’s surface. 
• The carbon cycle involves the exchange of carbon between living organisms, the atmosphere, and the ocean. 
• The nitrogen cycle involves the conversion of nitrogen into usable forms by bacteria and other organisms. 

• The oxygen cycle involves the production and consumption of oxygen by living organisms. 

Key Questions