The brightest object in the sky after the Sun and Moon is most often 

Mountains that rise sharply from surrounding land along a steeply inclined fault plane are 

The S-wave is a 

Our Sun is just one of many millions of stars in a group of stars called a 

The layer that is broken up into plates that move in the upper mantle is called the 

The primary difference between fog and a cloud is 

The least dense rocks in Earth are found in 

The planet listed below with the greatest density is 

Earth’s magnetic field seems to reverse its polarity about every 

One would expect to find deep, rich soil layers where the climate is