Science project

The Scratch Test: Testing a Rock's Hardness


  • Rock salt
  • Quartz
  • Nail
  • Other easily accessible minerals


  1. Observe the two minerals closely. Write down your observations of how they feel and look. You may even want to draw an illustration of the two minerals.
  2. Using the pointed end of the nail, carefully try to scratch the surface of the quartz. Record what happened. Did the nail scratch the quartz?
  3. Now try to scratch the rock salt with the nail. Record what happened. Did the nail scratch the rock salt?
  4. If you have other minerals, repeat this test on each of the minerals. Record all of your observations in chart.
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