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Energy and motion are found in common everyday things we find around us.

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Energy is a capacity for doing work.

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Motion is a term we use to describe things moving from one place to another.

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I can illustrate energy and its transformation using this ball.

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I put work in by raising it up to this height above my head,

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and then it transforms into energy of motion as I let go of it.

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Now we'll go over to our propulsion test facility

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and meet with engineering student Melanie Genetka.

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What we do here is test small-scale versions of rocket engines

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to see how the real ones will behave in flight.

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That's the whole idea behind proportionality,

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and doing it this way makes space transportation safer, more affordable, and more reliable.

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By taking his bike on a test run,

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Van was able to see how his bike would perform in an actual race.

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Proportionality is the use of ratios.

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In other words, this engine is about 2,000 times smaller than the real thing.

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Van's test run was 25 times shorter than the distance he'll travel in the race.

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Proportionality is used for everything.

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That includes art, cooking, and architecture.

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When we are designing and constructing state-of-the-art, multimillion-dollar stadiums,

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there are several steps we must take even before ground can be broken.

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One of those steps is to build the stadium, but on a much smaller scale.

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We call this proportionality.

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It's the use of ratios like 1 to 100 and scales in order to meet challenges.

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It's nothing new.

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It's likely the Egyptians used this to help build the Great Pyramids

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and the Romans to help construct the Colosseum.

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Today, proportionality is used everywhere.

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NASA even uses this to help construct future spacecraft.

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This is a scale model of the Raymond James Stadium,

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home of the Tampa Bay Buccaneers.

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Every inch here equals 100 feet, or 1,200 inches, of the real thing.

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A lot of this goes back to math class.

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It's all about proportions and scaling things.

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We pay close attention to the relationship between sizes.