Lab Supplies Needed
Plastic Beakers
Graduated Cylinder
Other Items Needed
- Rocks or Gravel
- Sand
- Soil or Silt
- Water
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Earth Science Lab - Porosity
Recommended Grade Level: Middle School
Instructions
There are many objects in nature that appear to be non-porous, like a solid rock. However, this is not always the case. Many rocks are actually years of particles compressed together eventually forming a rock - but leaving tiny spaces between these particles. This creates pores in a rock, much like those in a sponge, but much smaller and mostly invisible.
Challenge your students to think more about the world that surrounds them. Rocks are generally considered solid objects, but after investigating more closely, students can discover how pores in these rocks leave more room than you might suspect.
This lab requires only a few supplies: small rocks, sand and soil, 3 500 ml beakers, 100 ml graduated cylinder and some water. As always, please be sure to supervise this activity, as lab safety is very important.
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