A regular kitchen sponge has ________ porosity but ________ permeability.

Dynamothermal (regional) metamorphism occurs when ________.

Material through which water readily flows is termed ________.

Waves ________.

Which of the following common minerals is hardest?

Preexisting rock that is subsequently altered to form a metamorphic rock is termed a ________.

If a material is porous, it ________.

Which type of global change is reversible?

In a region with prominent orthogonal sets of joints, a ________ drainage network is expected.

Igneous rocks ________.