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Sills are formations of lava that cool on Earth’s surface in giant sheets.

Which igneous rock has the same chemical composition as basalt, but a different grain size?

Evidence that Earth’s magnetic field has undergone numerous reversals can be found

The presence of an oceanic trench, a chain of volcanic mountains along the edge of a continent, and deep-seated earthquakes is characteristic of

Accumulations of silt, sand, or other materials that settle out of water are called

Which of the following statements about earthquakes is FALSE?

What is the name given to the force that tends to pull rocks apart?

The transverse waves (S-waves) travel through Earth’s crust more rapidly than do the compressional waves (P-waves).

Which rock is more likely to break under stress?

Which of the following rocks makes up the bulk of Earth’s continents?