... blocks into cubes of 1cm3, 2cm3 and 3cm3 on a white tile. The same shape blocks (cubes) must be used so that it is a fair test. Accurately measuring and cutting them with the metric ruler and knife. The same source of agar must be used in order to be a fair test. 3. Next fill three beakers with 50 ml of hydrochloric acid. The volume of hydrochloric acid cubes are immersed in must remain the same in order to keep it a fair test. 4. Place the 3 different size pink agar blocks into the beakers and start three separate stop clocks immediately. 5. Stop the stop clock for each beaker once all the dye has disappeared and the block has turned white, throughout the experiment try and measure the ending point similarly in each experiment in order to be fair and gain accurate results. 6. Record this information ...

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