The viscosity of a magma is influenced by the amount of silica because __________.
Fill in the blank(s) with the appropriate word(s)
Answer: Silica builds silicate chains early in the magma cooling history and the chains tend to resist flow
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Little Johnnie from down the street from your house brings an object that looks like a bone, and Johnnie says "look, I found a dinosaur bone." Which of the following would not be useful in evaluating Johnnie's claim?
A) Extract charcoal from the object and use carbon-14 dating B) Evaluate the object for fine textures indicative of bone material or replaced bone material. C) Examine the object for hardness to determine if the sample is permineralized. D) Ask if the object was found embedded in rock.
Briefly describe how the Coriolis effect influences air movement
What will be an ideal response?
What is the smallest ocean?
A. Arctic B. Southern C. Pacific D. Atlantic E. Indian
What key characteristic marks the beginning stages of the collapse of a star?
A) The increase in temperature B) The depletion of carbon and oxygen C) The depletion of hydrogen D) The expulsion of energy