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Hi, I'm Jennifer Pulley, and welcome to NASA Connect, the show that connects you to the

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world of math, science, technology, and NASA.

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Today, we're at NASA Glenn Research Center in Cleveland, Ohio, and this is the Zero Gravity

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Facility, and it's where NASA conducts microgravity experiments.

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You've seen microgravity.

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You've seen it in videos of the International Space Station, and on NASA's KC-135.

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On today's program, we'll investigate how NASA researchers conduct research in a microgravity

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environment.

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You'll observe NASA researchers using the math concepts of measurement, ratios, and

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graphing to research combustion science, and the importance of fire safety on the International

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Space Station.

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In your classroom, you'll do a cool hands-on activity to learn more about gravity by collecting,

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organizing, graphing, and analyzing data.

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And using the instructional technology activity, you will investigate apparent weight to see

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how astronauts in space can feel weightless.

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NASA researchers use the math concepts of ratios, measurement, and graphing all the

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time.

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First, let's review ratios.

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A ratio is a comparison of two quantities.

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For example, NASA Glenn Research Center and NASA Marshall Space Flight Center, which are

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the NASA facilities that primarily conduct microgravity research, are two of ten NASA

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centers located across the country.

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A ratio can be written as a fraction, and it can be written in any form that is equal

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or equivalent to that fraction.

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So the ratio two-tenths can also be written as two is to ten, twenty percent, twenty-one-hundredths,

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and point-two-zero.

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When you work with ratios, you can express fractions, decimals, and percentages.

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To learn how NASA researchers apply the concept of ratios to the microgravity environment,

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let's go see Dr. Roger Crouch.

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He's the senior scientist for the International Space Station.