Science 6B Unit 1 Lesson 3 Review

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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!