Science project

Cube Lab

Research Questions:

  • In which cube was diffusion the most present?
  • Does the ratio of surface area to volume have to do with anything?
  • Why did the sodium hydroxide change colors?

Diffusion is the mixing of a substance with another substance in order to create equilibrium of both substances. The solution will try to diffuse through the agar cube. You will then see if more surface area has any effect to the rate of diffusion. Let’s get this project started shall we! Do not forget to put on your goggles and gloves!


  • Block of phenolphthalein agar
  • 100 ml 4% sodium hydroxide
  • Plastic spoon
  • Beaker 250mL
  • plastic table knife
  • millimeter ruler
  • paper towel

Experimental Procedure:

  1. Cut the agar cube into 3 smaller cubes. One 3cm, one 2cm, and one 1cm.
  2. Calculate their surface area to volume ratios.
  3. Put the 3 cubes into the beaker and fill the beaker ¾ full with sodium hydroxide. The colors should change.
  4. Leave it in there for 10 - 15 minutes.
  5. Take them out and dry each of them.
  6. Slice all of them in half and measure the amount of diffusion present in the cube by using the millimeter ruler and measuring the distance from the edge of the cube to the white part of the cube.
  7. Record all your data. Make a conclusion.

Terms/Concepts: Diffusion; Mixtures; Osmosis; Chemical Reactions


Sodium Hydroxide –

Phenolphthalein –

Disclaimer and Safety Precautions provides the Science Fair Project Ideas for informational purposes only. does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against that arise thereof. In addition, your access to's website and Science Fair Project Ideas is covered by's Privacy Policy and site Terms of Use, which include limitations on's liability.

Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.

Add to collection

Create new collection

Create new collection

New Collection


New Collection>

0 items