Obsidian is an igenous rock with a glassy appearance and minimal crystal growth. What accounts for this?
A) Obsidian is an intrusive igneous rock that cooled slowly beneath the Earth's surface, result in little crystal growth.
B) Obsidian is an extrusive igneous rock that cooled slowly on the Earth surface, resulting in little crystal growth.
C) Obsidian is an extrusive igneous rock that cooled very slowly on the Earth surface, resulting in little crystal growth.
D) Obsidian is an intrusive igneous rock that cooled rapidly beneath the Earth's surface, result in little crystal growth.
B
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Why does oil seep to the surface from its source rock?
a. Capillary actions b. Convection c. Oil is less dense than surrounding sediments d. Porosity is higher at the surface
Why do the planets orbit the sun and not the Earth?
A. Earth is not small enough to produce the kind of energy needed to control the other planets. B. Earth is not close enough to the center to control the orbits of other planets. C. Earth is not massive enough to have the kind of gravitational force needed to keep planets in orbit around it. D. All of these choices are correct. E. None of these choices are correct.
Analyze the concept map above and consider how this applies to biogeochemical cycles. Which selection is most appropriate for an atmosphere to biosphere interaction (letter M on the diagram)?
A. Deforestation B. Photosynthesis C. Coal formation D. Respiration
How does soil texture influence the growth of vegetation?