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Although it is not obvious to the casual observer, rocks absorb water. You can ask your students to observe rocks all day long and they will not be able to tell if the rocks they are observing are absorbing water. However, there is an investigation which allows students to discover that rocks absorb water and how much water specific rocks absorb.

An investigation in which students conduct three mini-experiments to discover how water passes through a plant's roots, stems, and exits through a plant's leaves.

Students use problem-based learning strategies and techniques to develop findings and make recommendations, along with preparing a press release in this case study.

Students conduct an experiment to determine the ability of rocks to absorb and retain water, making connections with the concepts of porosity and permeability in rocks.

One way to peak the interest of your students is to conduct an experiment using objects of things that they encounter often or even on a daily basis.