Briefly describe what makes volcano types different from one another and give an example of a type
What will be an ideal response?
Answer: Different magma compositions and types of eruptions, and varying proportions of lava flows to pyroclastic deposits determine the sizes and shapes of volcanoes. Shield volcanoes are small to giant volcanoes composed of many thin and widespread basaltic lava flows. The definitive shield shape is characterized by gentle slopes typically less than 15 degrees. They are active for centuries to a few million years.
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At a transform plate boundary, the two plates move:
a. laterally past each other. b. under and/or over each other. c. towards each other. d. away from each other. e. perpendicular to the length of the plate boundary.
Which scientist promoted the idea that species change over time, although he attributed this change to an incorrect mechanism?
A. Charles Darwin B. Thomas Malthus C. Jean Baptiste Lamarck D. Charles Lyell
El Niño:
A) usually causes drought in California. B) results from a lower temperature of surface waters in the eastern Pacific. C) results in both reduced air pressure and increased evaporation. D) typically does not affect the northern portion of the United States.
Which of the following parts of the ocean are likely to support the lowest oceanic productivity?
A. areas beneath the subtropical highs B. shallow seas C. middle-to-high-latitude areas D. areas where upwelling is occurring