Summed over the entire surface of Earth, the rate of spreading at divergent boundaries is ________ lithospheric consumption at subduction zones.

Marine magnetic anomaly belts run parallel to ________.

The density of rocks is generally related to composition. Which of the following choices places rock compositions in order of increasing density?

The branch of science that studies the structure and history of the Universe is ________.

Earth’s geothermal gradient is the rate of temperature change incurred by ________.

A biogeochemical cycle refers to the ________.

All else being equal, water will flow faster in a stream with ________ and a ________ wetted perimeter.

Large, thick-crusted, nonvolcanic mountain belts, like the Himalayas, are associated with ________.

Geologists call individual layers of sedimentary rocks ________, whereas several of them together are called ________.

Which of the following lists compositions in order of increasing silica content?