Rainbow Paper

Aim: To separate colours by using the process of chromatography.

Definition: Chromatography is a method of separating out materials from a mixture.

Eg. blood, ink, drugs,

Scenario

A crime has been committed. The police have a signed cheque and a letter from the same crime scene but it seems like the handwriting is different. They have 3 suspects but not enough evidence. They need to know if the letter and the cheque were written by the same person.

How do they tell if the pens used for both of these pieces of evidence are the same?

Rainbow paper

Materials;

1. Water

2. Cup

3. Chromotagraphy paper

4. Felt pens

Process:

Step 1: Draw two dots on the paper

Step 2: Pour the water in the cup

Step 3: Put the paper in the cup

Step 4: Watch the colour change

Conclusion: What have I learnt from this experiment?

If you put felt on paper the colour of the water can change and the colour starts to go up.

Skittles

Aim: To separate colours from skittles by using the chromatography.

Materials;

1. 
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Process:

Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:

Conclusion: What have I learnt from this experiment?