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Effects of Solar Radiation on Land and Sea
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In this activity, learners explore the different heating properties of soil and water.

Using a Simple Astrolabe
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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.

Space Stations: Measure Up!
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In this activity, learners work in pairs to measure each other's ankles with lengths of string.

Balloon Impacts
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In this activity, learners measure the diameter of their water balloons, model an impact, measure the diameter of the “crater” area, and determine the ratio of impactor to crater.

Measure the Speed of a Water Leak
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In this activity (page 2 of PDF under GPS: Glaciers Activity), learners will measure the rate at which water streams out of a leaky cup.

Does Air Weigh Anything?
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The demonstration/experiment provides quick proof that air has mass.

Map That Habitat
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Historically, sea floor mapping (bathymetry) was done by soundings.

Measure the Pressure II: The "Dry" Barometer
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In this activity, learners use simple items to construct a device for indicating air pressure changes.
Making Rivers
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In this outdoor water activity, learners explore how to change the direction of water flow. Learners make puddles in dirt or use existing puddles and sticks to make water flow.

Sizing Up Hail
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In this activity, learners will estimate the sizes of balls to learn how to estimate the size of hail. Learners will compare their estimates to the estimates of their peers and the real measurements.

Meteoroids and the Craters They Make
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In this activity, learners investigate the formation of craters. Learners will examine how the size, angle and speed of a meteorite's impact affects the properties of craters.

Finding the Size of the Sun and Moon
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In this activity, learners build a simple pinhole viewer. They use this apparatus to project images from a variety of light sources, including a candle, the Sun, and the Moon.

Twirling in the Breeze
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In this engineering activity, learners build a device (an anemometer) to measure how fast the wind is blowing.

Earth Atmosphere Composition
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In this activity, learners use rice grains to model the composition of the atmosphere of the Earth today and in 1880. Learners assemble the model while measuring percentages.

Atmosphere Composition Model
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In this activity, learners create a model using metric measuring tapes and atmosphere composition data.

Build a Solar System
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In this activity, learners make a scale model of the Solar System and learn the real definition of "space." Learners use the online calculator to create an appropriate scale to use as a basis for thei

How Big is Small
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In this classic hands-on activity, learners estimate the length of a molecule by floating a fatty acid (oleic acid) on water.

Measuring and Protecting Skin
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In this activity, learners compare and contrast their own skin (including the area covered) with that of an orange.

What does Color have to do with Cooling?
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In this demonstration/experiment, learners discover that different colors and materials (metals, fabrics, paints) radiate different amounts of energy and therefore, cool at different rates.