Junkao Science Knowledge case studies
Junkao Science Knowledge · Put your knowledge to work in context.
Junkao Science Knowledge is a multiple-choice science assessment that tests whether a candidate can reason across the standard middle- and early high-school science curriculum rather than recall isolated facts. It suits students preparing for competitive science placements, candidates moving into science teaching or tutoring, and adult learners who want an independent check of their general science foundation. The Junkao Science Knowledge case studies are 5 cases and about 4,031 words.
1The Duckweed Fertilizer Trial: One Jar, Two Explanations
Priya wants to test whether fertilizer runoff makes duckweed grow faster. She fills two 500 mL glass jars with pond water.
803 words, about 4 min2Reporting Density from a Noisy Balance and a Coarse Cylinder
Marco is measuring the density of a small irregular pebble for a lab report. His digital balance has 0.01 g resolution; repeated readings of the dry pebble give 12.34 g, 12.36 g, 12.35 g and 12.34 g, with the last digit flickering.
763 words, about 4 min3The Toy Car Ramp: Mass, Wheels, and a Confounded Comparison
Two students test the claim that heavier objects roll farther. They use a ramp 1.20 m long raised to 15 cm at one end and release cars from rest at the top.
838 words, about 4 min4Potato Cylinders and the Isotonic Point
Okafor's class investigates osmosis in potato tissue. Each group cuts cylinders with a 5 mm cork borer from the same potato.
819 words, about 4 min5The School-Yard Thermometer and a Four-Week Climate Claim
For a science fair project, Lena wants to show that her city is warmer than the surrounding countryside. She mounts a digital thermometer in a white plastic box on the south wall of her school, 2 m above an asphalt parking lot, and reads it every day at 15:00 for four weeks in July.
808 words, about 4 min