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The Effect of Environmental Factors on Wood Decay Featured science projectScience project video

Conclusion

The hypothesis that the wood immersed in the soil will start to decay and become weaker at a faster rate is proven to be true.

Wood is used to build many structures and in the making of furniture. The application of wood in construction will depend on its properties, like strength and durability. Other factors may include the finishing and maintenance requirements. Paint and varnish coating help to give wood a pleasant appearance, and also make  it last longer.
 

Also consider

What would happen if the science fair project was  conducted using other types of wood like Pine, Fir, Hemlock or Birch?

Try repeating the experiment,  this time exposing the wood  for different lengths of time (1 week, 2 weeks etc)  in order to study the rate at which the wood will weaken.
 

References

Wood preservation - http://www.forestprod.org/cdromdemo/wp/wp4.html

About exposed wood - http://www.chemisys.com.au/cutek/exposedwood.htm
 

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Complexity level:
7
Project cost ($):
90
Time required:
1 day to prepare, 18 days for observation
Material availability:
Most of the materials may be purchased at a supermarket. You can purchase the wood from a hardware store (Eg. Home Depot, Lowes)
Safety concerns:

Basic safety requirements