Expirement

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. paper

2. cup

3. two colouring pen

4. water

5. pencil

6. ruler

Process:

Step 1: get the materials like paper, pen ruler, colouring pen 

Step 2: put a line on the paper

Step 3:put the medium dot by colouring pen at the paper

Step 4:put the paper in the cup

Step 5:the teacher put the a water in the cup 

Step 6:and then wait, then boom you have a rainbow paper.

Conclusion: What have I learnt from this experiment?

I learned that Police people use this to do their invistegasion stuff and thanks to Mr palmer we learned how to do this expieremence even your at home and you wanted to try this you could use this steps easily.