What are the recommended materials for modeling impact craters?

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SUMMARY

This discussion focuses on modeling impact craters for an A level project using ball bearings dropped into sand. The user seeks clarity on the expected trends in width-depth ratios as variables such as drop height and ball weight/radius change. A recommendation is made to use flour instead of sand for improved consistency in results, as flour's smaller grain size reduces friction between particles. The provided link suggests that flour may yield more reliable data for small-scale experiments.

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  • Understanding of basic physics principles related to impact and projectile motion.
  • Familiarity with experimental design and data collection methods.
  • Knowledge of material properties, specifically the differences between sand and flour.
  • Ability to analyze and interpret experimental results quantitatively.
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  • Research the physics of impact craters and the factors influencing their formation.
  • Explore the use of flour in experimental modeling and its advantages over sand.
  • Investigate the relationship between drop height and crater dimensions in detail.
  • Learn about statistical methods for analyzing experimental data trends.
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Students conducting physics experiments, educators teaching impact dynamics, and researchers interested in experimental modeling of geological phenomena.

UK1989
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Hi

Basically, I am doing an A level project, in which I am investigating impact craters.

I am modeling this by dropping ball bearings into sand, and measuring the depth and width of the resulting crater.

However, my results are quite unclear, and I would really appreciate some guidance on the trends that would be expected.

My main question : would you expect there to be a constant width-depth ratio as the height of the ball drop increases?
Would there be a constant ratio as the weight/radius of the ball increases?

Thanks, any help is much appreciated.
 
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This site
http://www.tki.org.nz/r/science/science_is/activities/isact_models_craters_e.php suggests using flour not sand.

Flour grains are much smaller than sand and probably have less friction between the grains. That might help getting consistent results if you are doing "small scale" experiments.
 
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