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Get ready, we got five, last four, make sure you're breathing, three, two more, two, come

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on, you can do it, last one, there we go, alright guys, let's grab some water, rehydrate,

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take five.

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

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science, technology and NASA.

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In addition to being your host, I'm also a certified aerobics instructor.

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Hey Jennifer, that was a great workout, but I never knew I had so many stomach muscles.

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We do.

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I hope it helps me in my training.

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Oh, what are you training for?

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I want to try out for my cross-country team, and tryouts are in a couple of weeks.

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RJ, that is super, how's your training going?

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Well, I guess it's okay, but I really don't have too much energy during the day.

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Well, have you researched what nutrients your body needs?

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Because then you have to estimate and measure portions to make sure that the nutrients are

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in there, and of course you have to have an exercise program.

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Measuring and estimating my nutritional needs?

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An exercise program?

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Not really.

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I think I'm eating okay.

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Do I look overweight?

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No, not at all.

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Tell me, what did you eat for breakfast?

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I had a soda and a glazed honey bun.

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It's better than nothing.

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RJ, a soda and a glazed honey bun?

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That's loaded with sugar.

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Yeah, the sugar provides me with energy.

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Yeah, but that energy doesn't last throughout the whole day, and that's why you get tired.

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You need something more substantial for breakfast.

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You know what I think?

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I think that we need to reevaluate and improve your nutrition and exercise program, and that

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way we can get you in tip-top shape for the cross-country tryouts.

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Okay.

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Guys, on today's program, we will stress the importance of good nutrition and exercise,

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especially in the adolescent years.

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And that means you.

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We will visit with NASA researchers to tell us what we can learn in space about our bodies

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here on Earth.

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And I will offer you a challenge at the end of the program.

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But before we talk more about nutrition and exercise and visit with NASA researchers,

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we must first understand the mathematical concepts for today's program, which are estimation

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and measurement.

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During the course of the program, you will be asked to answer several inquiry-based questions.

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After the questions appear on the screen, your teacher will pause the program to allow

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you time to answer and discuss the questions.

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This is your time to explore and become critical thinkers.

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Students working in groups take a few minutes to answer the following questions.

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Number one, what does it mean to measure and estimate?

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Two, are both math concepts related to each other?

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Explain.

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Three, give some examples of things that you measure and estimate every day.

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Now compare your answers to all three questions with other groups in your class.

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It is now time to pause the tape.

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You know, guys, the math concepts of measurement and estimation are an essential part of our daily lives.

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Let's think about things that you measure on a daily basis.

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Well, you measure time with watches, weight with scales, and temperature with thermometers.

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You may think of such measurements as exact, but the accuracy of a measurement depends

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on the precision of the tool.

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In this sense, measurements can be thought of as estimations.

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Now let's think about things you estimate on a daily basis,

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like the length of time it takes to get ready in the morning,

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or how long you need to walk to the bus stop,

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or how much cereal you pour into the bowl.

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Estimation is a powerful mathematical idea that can be used both to solve problems

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and to check to see if our results are reasonable.

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You know, in reality, things aren't always exact,

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and good estimation skills are really important for living successfully.

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For example, Norbert here wants to see if the Galactic Fitness 9000 treadmill will fit in his spare bedroom.

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The dimensions for the base of the treadmill are 1.8 meters by 0.9 meters.

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Norbert's calculator indicates that the base area of the treadmill is 16.2 square meters.

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Now, does the base area of 16.2 square meters for a treadmill seem reasonable to you?

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16.2 square meters is about the size of Norbert's bedroom.

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That would mean the Galactic Fitness 9000 is a pretty big treadmill.

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Unless you tear down a wall, good luck trying to squeeze the treadmill through the door opening.

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Actually, Norbert forgot to enter the decimal point in 1.8 on his calculator.

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But, using mental math, Norbert's estimate suggested that the area of the treadmill

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should be about 2 meters by 1 meter, or 2 square meters.

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The actual base area of the treadmill is 1.62 square meters.

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In this case, Norbert used the estimation technique of rounding.

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Developing methods to check the reasonableness of results is vital to anyone working with numbers,

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especially engineers, scientists, and researchers.

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So, now do you have a good idea about the concepts of measurement and estimation?

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You know, this would be a good time to pause the tape and review your answers to the three questions I asked you earlier.

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I just want to make sure you're on the right track.