VALID Science 8 case studies
VALID Science 8 · Put your knowledge to work in context.
The page we rely on for this credential could not be read. The NSW Department of Education address listed for VALID returned a "Missing page – 404" response when retrieved on 2 November 2026, so the only verified statement we can make is that the official page was unavailable. We cannot confirm what VALID stands for in this context, which students it serves, what Science 8 covers, how many questions appear, how long the test runs, how it is scored, what it costs, or whether retakes are allowed. Because the source is silent, every one of those fields is left blank rather than filled from memory or assumption. The VALID Science 8 case studies are 5 cases and about 1,812 words.
1The Shrinking Puddle
A class sets two identical shallow trays of water on a windowsill. Tray A is left open.
377 words, about 2 min2The Mystery of the Floating Egg
Students place a fresh egg in a beaker of tap water. They stir in 40 g of salt and the egg rises until it floats with about a quarter of its shell above the surface.
368 words, about 2 min3The Case of the Wilting Seedlings
A student grows four identical bean seedlings in identical pots of the same soil. Each pot gets 50 mL of water every second day.
368 words, about 2 min4The Melting Ice Race
Four identical ice cubes, each 30 g and taken from the same freezer at −5 °C, are placed in four identical bowls at room temperature (21 °C). Bowl A holds the ice on a dry saucer.
356 words, about 2 min5The Disappearing Salt
A student adds 5 g of salt to 100 mL of water at 20 °C and stirs. The salt disappears and the water looks clear.
343 words, about 2 min