The apparent westward "drift" of the planets compared to the background stars is called ________
A) retrograde motion B) occultation C) Ptolemaic motion D) precession
A
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Which statement correctly describes rock-forming minerals and economic minerals?
a. Rock-forming minerals consist of a few types of minerals that are sparse in Earth's crust, whereas economic minerals are very abundant and are used extensively in the manufacture of products. b. Only minerals that are not rock-building minerals can have economic value. c. Silicates are important economic resources and include gypsum, which is used for plaster. Nonsilicate minerals are only important as rock-building minerals. d. Economic minerals consist mostly of silicate minerals, whereas rock-building minerals consist mostly of nonsilicates. e. Rock-forming minerals consist of a few types of minerals that are abundant in Earth's crust, whereas economic minerals are less abundant and are used extensively in the manufacture of products.
Which of the following is true about internal and external processes?
A. Internal processes include processes in the atmosphere and hydrosphere, while external processes occur in the lithosphere. B. Internal processes and external processes are largely independent of each other. C. Tectonics is an internal process and erosion is an external process. D. Internal processes tend to wear away parts of the landscape, while external processes build it back up again.
The entrance region occurs ____ of a jet streak, while the exit region occurs ____ of the jet streak
a. downwind; upwind b. upwind; downwind c. ahead; above d. downwind; above e. above; below
The most prominent pluvial development of the Pleistocene was the appearance of many ________
A) lakes B) mountain glaciers C) square kilometers of permafrost D) terminal moraines E) arêtes