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In this activity, learners explore the different heating properties of soil and water.

$1 - $5 per group Ages 8 - 14 2 to 4 hours
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In this activity, learners use their hands as tools for indirect measurement.

free Ages 11 - 14 10 to 30 minutes
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Learners measure irregularly shaped bones using a variety of measurement methods and tools. Then, they measure again using standard conventions and metric tape measures.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes
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In this activity (located on page 4 of PDF), learners gain insight into the actual size of dinosaurs and practice making estimations and measurements.

1 cent - $1 per group Ages 6 - 11 30 to 45 minutes
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In this activity, learners use an astrolabe to measure the altitude of objects. Learners will first practice taking measurements by measuring the altitude of trees and buildings.

$1 - $5 per student Ages 6 - 14 1 to 4 weeks
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This is an activity that models the operation of a seismograph, a tool used to measure the size of earthquakes.

1 cent - $1 per student Ages 11 - 18 30 to 45 minutes
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In this activity, learners make a barometer, an instrument to measure change in air pressure.

$5 - $10 per group Ages 8 - 14 1 to 7 days
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In this activity, learners measure and calculate the amount of cubic feet various containers contain. Next, learners investigate cubic feet per second (cps), by carrying jugs in one second.

free Ages 11 - 18 45 to 60 minutes
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In this indoor and/or outdoor activity, learners make an anemometer (an instrument to measure wind speed) out of a protractor, a ping pong ball and a length of thread or fishing line.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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In this activity, learners make their own pinhole viewer in order to measure the size of the sun.

$1 - $5 per group Ages 8 - adult 10 to 30 minutes
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In this activity, learners explore the size and scale of dinosaurs. Learners listen to "The Littlest Dinosaurs" by Bernard Most to learn about the different sizes of dinosaurs.

1 cent - $1 per group Ages 6 - 8 45 to 60 minutes
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In this highly physical outdoor activity, learners construct and compare experimental trail sections to select the best trail-construction technique for their site.

Over $20 per group Ages 8 - 18 1 to 2 hours
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In this activity, learners build their your own seismograph with household materials to document shaking.

$1 - $5 per student Ages 8 - 18 30 to 45 minutes
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Millions of organisms can live in and around a body of water.

1 cent - $1 per student Ages 8 - adult 45 to 60 minutes
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In this activity, learners will measure the length of their shadow from the Sun and compare it three to four months later.

free Ages 6 - 14 1 to 12 months
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In this activity, learners work in pairs to measure each other's ankles with lengths of string.

$1 - $5 per group Ages 8 - 14 5 to 10 minutes
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In this activity, learners explore the size and scale of dinosaurs. Learners listen to "The Littlest Dinosaurs" by Bernard Most. Then, learners estimate the size of a Triceratops and T.

1 cent - $1 per group Ages 4 - 6 45 to 60 minutes
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In this activity, learners make an astrolabe, a device used for measuring altitude, including the height of objects in the sky.

$1 - $5 per student Ages 6 - 14 5 to 10 minutes
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This activity models the way Landsat satellites use a thermal infrared sensor to measure land surface temperatures.

Over $20 per group Ages 4 - adult 5 to 10 minutes
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In this activity, learners build a tool called an inclinometer that can find the height of any distant object, from a tree to the North Star.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes