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Thanks, Dr. Avery. Okay, guys, let's review.

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So far, we introduced a new approach to understanding how the Earth works, called Earth System Science.

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Next, we defined what a system is and how the Earth system is composed of spheres.

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Now it's time for you to become an Earth System Scientist and apply what you've learned about systems.

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But before we begin the activity, let's review an important mathematical standard called representation.

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Representation is central to the study of mathematics.

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Basically, representations help you communicate your thinking.

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Some examples of representations include drawings, charts, graphs, symbols, and physical objects.

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By creating, comparing, and using various types of representations,

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you can develop and deepen your understanding of mathematical concepts and relationships.

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Earth System Scientists are constantly looking for patterns that can help them understand how the Earth works.

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By analyzing data, they can construct relationships among numbers and the scientific principles they are investigating.

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Often, scientists will present the relationships through some form of visual or graphical representation.

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Now that you understand the importance of representation,

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the students at Great Neck Middle School, right here in Virginia Beach, will show you this program's activity.

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It involves system diagrams.