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Title page type All topics
Why is a Full Moon So Bright? text page, free reflection, light, moon
Eclipse Watching text page, free electromagnetic spectrum, senses, sun, light, moon, solar system, safety, waves
A Compass at the South Pole text page critical thinking, earth, model, magnetism, attract/repel, hypothesis, theory, and law
Finding Your Way video sun, earth, cycles, information processing, measurement
75% Water video food web, critical thinking, earth, ecosystem, model, water cycle, information processing, water
Planets and Pennies video, free, ClosedCaptions mass, sun, earth, model, planet, moon, gravity, solar system, measurement
The Difference Between Weight and Mass video mass, earth, inertia, model, properties, moon, gravity, misconceptions, solar system, measurement, force and interactions, matter
Making a Compass video earth, properties, engineering, magnetism, structure and function
Launch of the Space Shuttle Discovery video earth, engineering, moon, information processing, solar system
Global Science video, free, ClosedCaptions sun, earth, seasons, cycles, model, moon, misconceptions
278 photo challenge star, atoms, periodic table, nuclear, element, rocks
296 photo challenge earth, moon, solar system
322 photo challenge reflection, light, moon
384 photo challenge sun, critical thinking, observation, light, moon, solar system, waves
466 photo challenge atmosphere, sun, observation, refraction, density, light, waves
Solar Power video sun, thermal energy, light, electricity, energy
Making Craters video planet, moon, solar system
924Trees with yellow leaves photo challenge adaptation, critical thinking, earth, observation, plant parts, climate, weather, plants, evolution
How Far is That Planet? text page planet, moon, solar system, measurement
Making a Scale Model of the Solar System video sun, earth, model, planet, solar system