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 and cannot be completed mechanically — read those sentences before you mark anything else. The key below is screen-only and will not print.
A Physical or chemical — tick one column for each row
The statement
Physical property
Chemical property
This nail is 6 centimetres long.
This nail rusts in salt water.
This cloth tears easily.
This cloth burns quickly.
This leaf rots in two weeks.
This leaf is dark green.
B Predict, then say how you would find out — one sentence in each box
Material
Will it rot in soil?
How would you find out?
Banana peel
Plastic spoon
Newspaper
Glass bottle
C Was a new material made — write YES or NO, then give your evidence
What happened
New material?
My evidence
Ice melted in a glass
A match burned down
Sugar dissolved in water
Milk turned sour
D Two nails, one week — the investigation you set up on Monday
What I saw
What I think it means
These are different questions and the boxes are the same size on purpose. You can see the colour correctly and still be wrong about why.
★ The challenge — read the label, then answer
A juice carton says <b>NO CHEMICALS ADDED</b>. Is the carton telling the truth? <span class="blank lg"></span>
Write one sentence saying what you think the label is <b>trying</b> to say. <span class="blank lg"></span>
You believe your prediction about the nails is right. <b>What would have to happen for you to change your mind?</b> <span class="blank lg"></span> <span class="blank lg"></span>
Answer key — screen only, not printed.
<b>A</b> · physical · chemical · physical · chemical · chemical · physical | <b>B</b> · yes / no / yes / no, and the method must involve <b>burying it and waiting</b> — an answer that says "look at it" has missed the point of the whole week.<br><b>C</b> · NO (freeze it back) · YES (ash, smoke, heat; cannot be undone) · NO (boil the water off and the sugar returns) · YES (smell and texture changed; cannot be undone).<br><b>D</b> · varies. Check that the left box has no words like <i>because</i>, <i>so</i> or <i>probably</i> — those belong in the right box.<br><b>★ This is the diagnostic.</b> Item 1: <b>no</b> — juice, water and sugar are all chemicals. Item 2: accept anything close to "nothing was added that is not on the list". <b>Item 3 is the one that reads.</b> A learner who cannot name any evidence that would change their mind has not yet understood that a prediction is a claim about the world rather than a preference. That is worth more of your attention than items A to C combined.