2.2. Grain size and shape

Try these first

1. 1.

   What is grain size in soil?

   Hint

   Think about how we measure the size of small objects.

2. 2.

   What effect does grain shape have on soil?

   Hint

   Consider how blocks fit together.

3. 3.

   What is the primary factor that affects soil compaction?

   • Grain Size
   • Color
   • Organic Matter

   Hint

   Think about how different sizes fill spaces.

4. 4.

   True or False: Round grains typically provide better compaction than angular grains.

   • True
   • False

   Hint

   Consider how bricks stack versus marbles.

5. 5.

   Given a soil sample of varying grain sizes, predict how this might affect its compaction properties in a construction project.

   Hint

   Consider how an assortment of marble sizes changes a container's fill.

6. 6.

   Explain how the combination of grain shape and water content could affect a construction site’s soil analysis.

   Hint

   Think about the wet sand’s ability to hold a castle shape.