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The Chemistry of Hard Water video, checked solution, surface tension, reaction, mixture, water
Igneous Rocks and Bubbles video, free, learnalong, Updated solution, states of matter, critical thinking, volcanoes, model, rocks
Microscopes: Growing Crystals video, free, learnalong, Updated refraction, light, microscope, waves, classification, crystals
Making Butter video, free, ClosedCaptions, Updated polar/nonpolar, solution, surface tension, digestive system, mammals, human body, mixture, water
Understanding "Chemical Formula" text page, learnalong, checked chemical formula, minerals, rocks
What Really Happens With Evaporation? text page, free, checked kinetic/potential, states of matter, atoms, critical thinking, thermal energy, weather, water cycle, misconceptions, physical-chemical change, water
Why We Use Soap text page polar/nonpolar, surface tension, investigations and experiments, mixture, water
Air has Weight text page mass, states of matter, critical thinking, properties, density, pressure, gravity, expand/contract, misconceptions, measurement, force and interactions
Bad Chocolate? text page senses, states of matter, Variables and controls, critical thinking, observation, properties, digestive system, investigations and experiments, mixture, crystals, physical-chemical change
Black and White Smoke text page Variables and controls, reaction, combustion, investigations and experiments
Feeling the Pressure text page senses, critical thinking, pressure, gravity, measurement, water, force and interactions
Changing How We Look at Changing text page, free solution, states of matter, critical thinking, reaction, misconceptions, classification, physical-chemical change
Squeezing Matter text page states of matter, properties, pressure, classification, measurement, force and interactions, matter
Understanding "Internal Crystalline Structure" text page, learnalong, checked minerals, rocks, crystals
States of Matter text page states of matter, observation, cycles, misconceptions, physical-chemical change
Science of Papal Smoke Colors text page, free Variables and controls, observation, reaction, combustion, investigations and experiments, physical-chemical change
The Solution to Crystals text page solution, thermal energy, minerals, physical-chemical change
Yellowing Paper text page, free, checked electromagnetic spectrum, science fair, Variables and controls, critical thinking, observation, light, investigations and experiments, physical-chemical change, energy
Teach It Right the First Time. text page, free states of matter, critical thinking, information processing, misconceptions, matter
Water Wall text page, free, checked surface tension, water
Breathing Hot and Cold text page states of matter, Variables and controls, critical thinking, observation, thermal energy, engineering, respiratory system, information processing, structure and function, misconceptions, human body, investigations and experiments, water, force and interactions
Broccoli Science text page cells, Variables and controls, acid-base, plant parts, reaction, plants, investigations and experiments
Why Fry? text page senses, conduction, thermal energy, digestive system, investigations and experiments, physical-chemical change
Butter Science text page polar/nonpolar, states of matter, observation, properties, density, investigations and experiments, mixture
A Cool Change text page solution, reaction, thermal energy, measurement, investigations and experiments, physical-chemical change, energy
The Science of Campfires text page mass, Variables and controls, critical thinking, observation, reaction, combustion, properties, thermal energy, investigations and experiments
Comparing How Sound Moves Through Liquids and Gases text page states of matter, density, sound, energy
Sorting Salt and Pepper, How Many Ways? text page, free mass, solution, static electricity, Variables and controls, critical thinking, observation, motion, properties, density, engineering, friction, electricity, structure and function, attract/repel, investigations and experiments, mixture, force and interactions
Crystal Angles text page, checked minerals, measurement, crystals
Can Water Float? text page Variables and controls, critical thinking, observation, thermal energy, density, expand/contract, investigations and experiments, water

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