Blog

A common scale for denoting a mineral’s hardness is the

Secondary seismic waves travel ______________ primary waves in solids.

The most common rocks on Earth’s surface are

Tracks, borings, and burrows are examples of

Large fractures in Earth’s surface that are associated with the movement of lithospheric plates are called ______________.

The scientist ______________ is generally regarded as “the father of geology.”

If iron floats in liquid mercury, then the specific gravity of iron is

Rocks solidified from molten material below ground are classified as ______________ igneous rocks.

Wood from an ancient stump has a ratio of carbon-14 to carbon-12 that is one-fourth that of new wood. About how old is the stump? (Carbon-14’s half-life is 5730 years.)

S seismic waves can travel only through ______________.