Presentation Transcript
Lesson 3 Review :Lesson 3 Review Cycles in the Atmosphere
What is a biochemical cycle? :What is a biochemical cycle? a series of chemical reactions that transfer nutrients between the atmosphere, the Earth’s surface and living organisms
Converts the nutrients into different forms along the journey
Why is it a cycle? :Why is it a cycle? They are cycles because a gas, such as CO2, starts in the atmosphere
Travels through living things and the Earth
Eventually will return to the atmosphere
The Carbon Cycle :The Carbon Cycle
The Nitrogen Cycle :The Nitrogen Cycle
Wrap-up :Wrap-up Remember, these cycles are vital to life on Earth’s planet. Humans cannot ‘inhale’ these chemicals from the atmosphere and use them in our bodies. We rely on plants and other animals to convert them into the forms we need!