A very fast high-altitude river of air that forms in the upper troposphere is called a(n) __________.

Debate about how to classify the newly discovered Eris, an object similar to Pluto, which led the International Astronomical Union to form a new category. 

The tide-generating force is a combination of the __________ and __________.

According to the graph below, what grade of metamorphic rock would develop at 6 kbar and 550°C?

The atmospheric greenhouse effect is responsible for _____.

Nicolaus Copernicus published a book arguing against Ptolemy’s model of the Universe, demonstrating a __________ model instead. Copernicus’ model was not widely accepted until __________ published a book with evidence supporting it.

The subtropical jet stream exists as a result of the boundary between a __________; the polar-front jet stream exists as a result of the boundary between __________.

Cinnabar (HgS) is in the same mineral class as ________.

According to the image below, where is new oceanic crust being formed?

The process by which solid material is carried away by glaciers, rivers, wind, or waves is called ______.