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Study guides
Study guides2026/10/14
Flame test colors explained: from a colored flame to an emission spectrum
Explain sodium yellow, potassium lilac, and other flame-test colors, then use spectra, contamination controls, and electron transitions to interpret the evidence.
Learning resources
Learning resources2026/10/14
Free science simulations or paid virtual labs: which fits your task?
Compare PhET, Labster, and Scivra by learning task, access model, and measurement workflow, using public product information and practical selection questions.
Study guides
Study guides2026/10/14
Gel electrophoresis virtual lab: read bands, estimate DNA size, and connect PCR
Interpret a virtual DNA gel using migration direction, a ladder calibration, voltage and time, detection limits, and the distinction between PCR amplification and separation.
Study guides
Study guides2026/10/14
Photosynthesis leaf disk lab online: controls, floating counts, and ET50
Use a virtual leaf disk investigation to interpret infiltration, control cups, ET50, light saturation, and the difference between net and gross photosynthesis.
Study guides
Study guides2026/10/14
Plate tectonics simulation for high school: read seafloor evidence and boundaries
Connect ridge distance, crustal age, magnetic stripes, depth, and boundary events in a high-school plate tectonics simulation, with the model conditions kept explicit.
Study guides
Study guides2026/10/14
Virtual chromatography lab: calculate Rf and compare an unknown
Use spot and solvent-front distances to calculate Rf, compare dye standards under matched conditions, and explain what a chromatogram can and cannot identify.