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How many half-lives have occurred for a mineral specimen if you determine that there is 50% of a given parent isotope remaining? 

Why are some of the most biologically productive regions in the oceans found along the western coastlines of the continents?

What causes water to become more dense and sink in the North Atlantic?

Match each of the planets with their relative distance from the Sun with 1 being the closest and 8 being the furthest.

Which of the seismic waves are slowest?

Geology is the study of ___________.

How long ago did the Big Bang occur?

Basalt is fine-grained and is primarily composed of mafic minerals. 

Imagine that temperature cools. This leads to more snow. More snow increases the albedo of Earth’s surface. As the albedo increases, more sunlight is reflected back to space and the temperature gets colder. What type of feedback does this represent?

What are two major differences between Venus and Earth that have led to the much more hospitable conditions we currently experience here on Earth? Select the two that apply