In the figure below, which way is the wave moving?

During most of the Mesozoic Era, Earth was ________.

Bombs, ash, and cinders are all examples of ________.

Diagenesis refers to ________.

Currently, the most accurate ages of Earth come from dating ________.

Evidence that glaciers once covered an area might include ________.

You are a coastal geologist trying to help a coastal community restore its sediment-starved beach. You decide that beach nourishment is the best option, so you order that dredge sediment from the nearest river be placed on the beach. The sediment is 70% silt and 30% sand. What will be the effect of using this sediment?

The greenhouse effect is caused by ________.

You are testing the groundwater quality of an aquifer and find that it has high amounts of arsenic. What is the likely source?

The volcanoes of the Cascades Mountains in the northwest United States are related to melting of rock associated with a ________.