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Globe at Night
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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

Reason for the Seasons
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In this activity (on page 6 of the PDF), learners plot the path of the sun's apparent movement across the sky on two days, with the second day occurring two or three months after the first.

Plant Piping
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Learners build models to learn about the special cells and structures that plants use to move water from their roots up through the stems and leaves.

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

Coma Cluster of Galaxies
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In this activity, learners will first learn the basics of galaxy classification and grouping.

Mirror, Mirror
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In this activity, learners test the Law of Reflection based on experimental evidence. Learners produce raw data and explanations based on their data: pencil tracings of incident and reflection rays.

Sea Level: On The Rise
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Learners will understand the relationship between climate change and sea-level rise.

Fossil Dig Site
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In this activity (located on page 5 of PDF), learners work in groups to create dig sites for display.

Candy Chemosynthesis
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In this activity, groups of learners work together to create edible models of chemicals involved in autotrophic nutrition.

What's the Difference between Weather and Climate?
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In this interactive and informative group activity, learners use packages of M&M's to illustrate the difference between weather and climate.

Black Holes: No Escape
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This fun and simple hands-on astronomy activity lets learners experiment with marbles and weights to discover some basics about gravity and black holes.

Mini Glacier Meltdown
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This activity (located on page 3 of the PDF under GPS: Glaciers Activity) is a full inquiry investigation about the different causes of glacial melt.

Sustainable Fishing
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In this activity, learners use a model for how fishing affects marine life populations, and will construct explanations for one of the reasons why fish populations are declining.

Tree Trunk Diameter to Branch Height Relationship
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In this activity (located on page 2 of the PDF under GPS: Temperate Rain Forest Activity), learners will identify a group of deciduous trees to study.

Topographic Investigation: Map an Underwater Surface
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In this activity, learners create a map of a hidden surface using a "sounding stick" -- a technique similar to how underwater maps were once made.

Hot Air
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In this activity, learners set up an experiment to investigate the effects of hot air on the path of a laser beam.

Pop! Rocket Launcher
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In this activity, learners construct a simple air pressure launcher for paper rockets.

Investigating Ice Worlds
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In this activity about the solar system, learners use various light sources to examine ice with different components to understand how NASA studies planets and moons from space.

Launch Altitude Tracker
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In this activity, learners construct hand-held altitude trackers. The device is a sighting tube with a marked water level that permits measurement of the inclination of the tube.

Colors of Stars
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In this activity, learners observe colors in the flame of a burning candle to explore connections between matter, light, color and temperature -- basic concepts of matter and energy.