What is a supercontinent? Identify the supercontinents of the Proterozoic. Discuss their history. What will be an ideal response?
A supercontinent consists of at least two continents merged into one, and we usually refer to a
supercontinent as a one composed of all or most of Earth’s landmasses. Two supercontinents
existed in the Proterozoic: Rodinia assembled between 1.3 and 1.0 billion years ago, and
fragmented 750 million years ago. The continents reassembled 650 million years ago into
another supercontinent, Pannotia. This began fragmenting 550 million years ago, near the end of
the Proterozoic
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Carbon-12 and carbon-14 are isotopes of carbon. These isotopes differ in the number of
A) protons. B) neutrons. C) electrons. D) protons, neutrons, or electrons.
The Himalaya Mountains are an example of
a. an oceanic-continental convergent plate boundary. c. an oceanic-oceanic divergent plate boundary. b. a transform plate boundary. d. a continental-continental convergent plate boundary
Minerals have a wide variety of applications. Select five of the following substances and identify what minerals they contain
What will be an ideal response?
The coastlines that surround the United States are diverse in sediment profile, storm exposure, and wave energy. Which coast has open exposure to large storm waves that are high energy waves and an emergent coastline of young sedimentary bedrock?
a) Atlantic Coast b) Pacific Coast c) Gulf of Mexico Coast d) Arctic Coast e) Great Lakes Coast