Large estuaries are more common on a(n) ________ coastline.

A worm would stand a poor chance of being fossilized because ________.

The trace gas(es) that is(are) most important are ________.

For a radiometric date to be useful, which of the following is true?

What percent of the solar energy reaching the top of the atmosphere passes through the atmosphere and is absorbed at Earth’s surface?

Feedback mechanisms that produce results that are just the opposite of the initial change are called ________.

What term denotes blocks of older rock enclosed in a body of younger igneous rock?

Which of the following geologic observations would not bear directly on working out the sequence of geologic events in an area?

Who made the first clear statement of the law of superposition? When?

The climate system consists of the ________.