Teacher: One page per learner, printed A4. Sections <b>A</b> and <b>B</b> count toward <b>Written Works</b>; see <code>assessment.md</code> §1. Item <b>★</b> is the diagnostic: it is the one case where the two tests disagree, and no amount of memorising the list answers it. The key below is screen-only and will not print.
A Label and evidence — the evidence column is where the marks are
The change
Physical or chemical
My evidence
Ice melting on a plate
Paper burning
Salt dissolving in water
An egg being fried
A shirt drying on the line
An iron nail rusting
B Getting it back — name the technique
The mixture
How to separate it
Salt dissolved in water
Sand stirred into water
Iron filings in sawdust
Rice with small stones in it
Rice grains with their husks
C The four signs — write all four from memory
<span class="blank lg"></span>
<span class="blank lg"></span>
<span class="blank lg"></span>
<span class="blank lg"></span>
D The saucer on the windowsill — salt water, left since Monday
What I saw
What I think it means
The two boxes are the same size on purpose. You can describe the saucer correctly and still be wrong about what it proves.
★ The challenge — the case where the two tests disagree
A glass is dropped and shatters. <b>Can you get it back?</b> <span class="blank"></span>
<b>Was a new material made?</b> <span class="blank"></span>
The two answers do not match. Which question decides whether the change is physical or chemical, and <b>why</b>? <span class="blank lg"></span> <span class="blank lg"></span>
Answer key — screen only, not printed.
<b>A</b> · physical (still water — freeze it) · chemical (ash and smoke; write on the ash and see) · physical (taste it, or evaporate the water) · chemical (cannot be returned to raw) · physical (the water became a gas) · chemical (rust is a different material; the nail underneath is thinner). <b>The label alone scores half.</b> The evidence column is the competency.<br><b>B</b> · evaporation · filtering or decantation · a magnet · picking · winnowing. All five are named in the guide's competency 6.<br><b>C</b> · a colour change that will not wash off · a gas produced · heat or light given off · a solid appearing in a clear liquid.<br><b>D</b> · varies. Check the left box has no <i>because</i> or <i>so</i>.<br><b>★ This is the diagnostic.</b> Item 1: <b>no</b>. Item 2: <b>no</b> — every piece is still glass. Item 3: the <b>new-material</b> question decides, so shattering is a <b>physical</b> change. A learner who answers "chemical, because you cannot undo it" has the shortcut without the idea — which is exactly what this item exists to find, and it is not a careless mistake. Teach it, do not just mark it.