VALID Science 10 case studies
VALID Science 10 · Put your knowledge to work in context.
VALID Science 10 is a standalone assessment credential for learners who have completed a Grade 10-level integrated science course or its equivalent and want independent evidence of that knowledge. It suits students building a transcript, home-schooled learners seeking third-party verification, adult learners refreshing science before further study, and anyone preparing for senior secondary science courses. The exam samples ten domains: scientific processes and experimental design; atomic structure and the periodic table; chemical reactions and conservation of mass; compounds, bonding, and nomenclature; motion, forces, and energy; electricity and circuits; Earth's structure, plate tectonics, and geological processes; weather, climate, and the atmosphere; cells, genetics, and reproduction; and ecology and sustainability. Questions are multiple choice and test reasoning with data, diagrams, and short scenarios rather than memorized trivia alone, so expect to interpret a graph, predict a product, or read a circuit. The VALID Science 10 case studies are 5 cases and about 1,961 words.
1The Greenhouse Trial That Would Not Reproduce
A student team tests whether a new liquid fertilizer increases bean growth. They plant 30 bean seeds in 30 identical pots using the same potting soil.
470 words, about 2 min2Balancing a Combustion Reaction Under Constraint
A technician burns propane (C₃H₈) in a sealed 10 L vessel to heat a small sample. The vessel initially contains 0.30 mol of propane and 1.20 mol of oxygen gas.
374 words, about 2 min3Two Lamps, One Battery: Predicting Brightness
A student builds two circuits using the same 6.0 V battery and two identical lamps, each with resistance 12 Ω. In Circuit A, the lamps are connected in series.
385 words, about 2 min4Reading the Rocks at a Faulted Coastline
Geologists map a coastal cliff exposing three rock units. Unit X is a layered sandstone containing marine fossils.
382 words, about 2 min5A Pond, a Fertilizer Spill, and an Algal Bloom
A farm pond receives runoff after a fertilizer spill. Within two weeks, the pond surface is covered in green algae.
350 words, about 2 min