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A Funny Taste
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In this activity, learners explore the different salinities of various sources of water by taste-testing.
Pinhole Viewer
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In this activity, learners discuss and investigate how cameras, telescopes, and their own eyes use light in similar ways.
Glue Stick Sunset
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In this activity, learners explore why the sky is blue. Learners model the scattering of light by the atmosphere, which creates the blue sky and red sunset, using a flashlight and clear glue sticks.
Exploring Shadows
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This activity guide features three related explorations to help learners ages 3-6 investigate shadows via the following science concepts: A shadow is made when an object blocks the light; you can chan
Clay Exploration
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In this activity, learners explore the possibilities of clay as a natural material.
Make a Telescope
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In this optics activity, learners make a simple telescope using two lenses and a cardboard tube. Learners construct the telescope and then calculate its magnification.
Spectroscope
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In this activity (posted on March 12, 2011), learners follow the steps to construct a spectroscope, a tool used to analyze light and color.
Water Quality and pH Levels in Aquatic Ecosystems
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In this fun and in depth hands-on experiment, learners test various liquid samples (distilled water, lemon juice, vinegar, and baking soda mixed with water) to determine their pH levels and identify e
Experiencing Parallax With Your Thumb
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In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.
Glass and Mirrors: An Inside Look at Telescopes
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This hands-on astronomy activity allows you to create a “cutaway” telescope to clearly show how reflector and refractor telescopes work.
Magnification vs. Resolution: Can you see the flag on the Moon?
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This fun and simple hands-on astronomy activity lets learners explore the difference between telescope magnification and resolution.
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.
Fish Eyes: More than Meets the Eye
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In this data collection and analysis activity, learners evaluate fish physiology and ecology using vision research data from Dr.
Rainbow in the Room
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This activity generates learner excitement about light through the creation of a room-sized rainbow.
It's all Done with Mirrors
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This fun and simple hands-on astronomy activity illustrates the path of light as it reflects off of mirrors and how this is used in telescopes.
Light is Made of Colors
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Learners observe different light sources, outdoors and indoors, using prism glasses (diffraction glasses) and color filters.
Ready to Observe: Enhance Your Telescope Experience
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This fun hands-on astronomy activity uses a variety of simple props to help learners understand why they see what they see in a telescope.
Make a Comet Model and Eat It!
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In this activity, learners build models of comets, using edible materials, to learn about comets' structure.
Sensory Hi-Lo Hunt
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In this outdoor activity, learners use only their senses to to find the extremes of several environmental variables or physical factors: wind, temperature, light, slope and moisture.
Underwater Hide and Seek
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In this activity, learners experience firsthand how marine animals' adaptive coloration camouflages them from prey.